diff --git a/ammolite/src/main/java/com/vitorpamplona/ammolite/relays/RelayStats.kt b/ammolite/src/main/java/com/vitorpamplona/ammolite/relays/RelayStats.kt
index df0f5a5d1..b386b3f9c 100644
--- a/ammolite/src/main/java/com/vitorpamplona/ammolite/relays/RelayStats.kt
+++ b/ammolite/src/main/java/com/vitorpamplona/ammolite/relays/RelayStats.kt
@@ -30,14 +30,14 @@ object RelayStats {
 
     fun addBytesReceived(
         url: String,
-        bytesUsedInMemory: Int,
+        bytesUsedInMemory: Long,
     ) {
         get(url).addBytesReceived(bytesUsedInMemory)
     }
 
     fun addBytesSent(
         url: String,
-        bytesUsedInMemory: Int,
+        bytesUsedInMemory: Long,
     ) {
         get(url).addBytesSent(bytesUsedInMemory)
     }
@@ -102,11 +102,11 @@ class RelayStat(
         messages.put(debugMessage, debugMessage)
     }
 
-    fun addBytesReceived(bytesUsedInMemory: Int) {
+    fun addBytesReceived(bytesUsedInMemory: Long) {
         receivedBytes += bytesUsedInMemory
     }
 
-    fun addBytesSent(bytesUsedInMemory: Int) {
+    fun addBytesSent(bytesUsedInMemory: Long) {
         sentBytes += bytesUsedInMemory
     }
 
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/encoders/ATag.kt b/quartz/src/main/java/com/vitorpamplona/quartz/encoders/ATag.kt
index dd4dcfc7d..5ae3d85f2 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/encoders/ATag.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/encoders/ATag.kt
@@ -22,6 +22,8 @@ package com.vitorpamplona.quartz.encoders
 
 import android.util.Log
 import androidx.compose.runtime.Immutable
+import com.vitorpamplona.quartz.utils.bytesUsedInMemory
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 
 @Immutable
 data class ATag(
@@ -30,6 +32,13 @@ data class ATag(
     val dTag: String,
     val relay: String?,
 ) {
+    fun countMemory(): Long =
+        5 * pointerSizeInBytes + // 7 fields, 4 bytes each reference (32bit)
+            8L + // kind
+            pubKeyHex.bytesUsedInMemory() +
+            dTag.bytesUsedInMemory() +
+            (relay?.bytesUsedInMemory() ?: 0)
+
     fun toTag() = assembleATag(kind, pubKeyHex, dTag)
 
     fun toNAddr(): String =
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/AppDefinitionEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/AppDefinitionEvent.kt
index 5ccad15c8..c56eec3da 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/AppDefinitionEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/AppDefinitionEvent.kt
@@ -27,6 +27,8 @@ import com.fasterxml.jackson.annotation.JsonProperty
 import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.signers.NostrSigner
 import com.vitorpamplona.quartz.utils.TimeUtils
+import com.vitorpamplona.quartz.utils.bytesUsedInMemory
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 import java.io.ByteArrayInputStream
 
 @Stable
@@ -58,6 +60,28 @@ class AppMetadata {
     @Transient
     var tags: ImmutableListOfLists<String>? = null
 
+    fun countMemory(): Long =
+        20 * pointerSizeInBytes + // 20 fields, 4 bytes for each reference
+            (name?.bytesUsedInMemory() ?: 0L) +
+            (username?.bytesUsedInMemory() ?: 0L) +
+            (displayName?.bytesUsedInMemory() ?: 0L) +
+            (picture?.bytesUsedInMemory() ?: 0L) +
+            (banner?.bytesUsedInMemory() ?: 0L) +
+            (image?.bytesUsedInMemory() ?: 0L) +
+            (website?.bytesUsedInMemory() ?: 0L) +
+            (about?.bytesUsedInMemory() ?: 0L) +
+            (subscription?.bytesUsedInMemory() ?: 0L) +
+            (cashuAccepted?.bytesUsedInMemory() ?: 0L) +
+            (encryptionSupported?.bytesUsedInMemory() ?: 0L) +
+            (personalized?.bytesUsedInMemory() ?: 0L) + // A Boolean has 8 bytes of header, plus 1 byte of payload, for a total of 9 bytes of information. The JVM then rounds it up to the next multiple of 8. so the one instance of java.lang.Boolean takes up 16 bytes of memory.
+            (amount?.bytesUsedInMemory() ?: 0L) +
+            (nip05?.bytesUsedInMemory() ?: 0L) +
+            (domain?.bytesUsedInMemory() ?: 0L) +
+            (lud06?.bytesUsedInMemory() ?: 0L) +
+            (lud16?.bytesUsedInMemory() ?: 0L) +
+            (twitter?.bytesUsedInMemory() ?: 0L) +
+            (tags?.lists?.sumOf { it.sumOf { it.bytesUsedInMemory() } } ?: 0L)
+
     fun anyName(): String? = displayName ?: name ?: username
 
     fun anyNameStartsWith(prefix: String): Boolean =
@@ -108,6 +132,8 @@ class AppDefinitionEvent(
     content: String,
     sig: HexKey,
 ) : BaseAddressableEvent(id, pubKey, createdAt, KIND, tags, content, sig) {
+    override fun countMemory(): Long = super.countMemory() + (cachedMetadata?.countMemory() ?: 8L)
+
     @Transient private var cachedMetadata: AppMetadata? = null
 
     fun appMetaData() =
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/ChannelListEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/ChannelListEvent.kt
index 489ed4b1c..3943c76b0 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/ChannelListEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/ChannelListEvent.kt
@@ -24,6 +24,8 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.signers.NostrSigner
 import com.vitorpamplona.quartz.utils.TimeUtils
+import com.vitorpamplona.quartz.utils.bytesUsedInMemory
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 import kotlinx.collections.immutable.ImmutableSet
 
 @Immutable
@@ -37,6 +39,10 @@ class ChannelListEvent(
 ) : GeneralListEvent(id, pubKey, createdAt, KIND, tags, content, sig) {
     @Transient var publicAndPrivateEventCache: ImmutableSet<HexKey>? = null
 
+    override fun countMemory(): Long =
+        super.countMemory() +
+            32 + (publicAndPrivateEventCache?.sumOf { pointerSizeInBytes + it.bytesUsedInMemory() } ?: 0L) // rough calculation
+
     override fun dTag() = FIXED_D_TAG
 
     fun publicAndPrivateEvents(
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/CommunityListEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/CommunityListEvent.kt
index 9ab0866af..f8e0d3dae 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/CommunityListEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/CommunityListEvent.kt
@@ -25,6 +25,7 @@ import com.vitorpamplona.quartz.encoders.ATag
 import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.signers.NostrSigner
 import com.vitorpamplona.quartz.utils.TimeUtils
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 import kotlinx.collections.immutable.ImmutableSet
 import kotlinx.collections.immutable.toImmutableSet
 
@@ -39,6 +40,10 @@ class CommunityListEvent(
 ) : GeneralListEvent(id, pubKey, createdAt, KIND, tags, content, sig) {
     @Transient var publicAndPrivateEventCache: ImmutableSet<ATag>? = null
 
+    override fun countMemory(): Long =
+        super.countMemory() +
+            32 + (publicAndPrivateEventCache?.sumOf { pointerSizeInBytes + it.countMemory() } ?: 0L) // rough calculation
+
     override fun dTag() = FIXED_D_TAG
 
     fun publicAndPrivateEvents(
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/ContactListEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/ContactListEvent.kt
index ac0135674..28f297524 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/ContactListEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/ContactListEvent.kt
@@ -46,40 +46,35 @@ class ContactListEvent(
     content: String,
     sig: HexKey,
 ) : Event(id, pubKey, createdAt, KIND, tags, content, sig) {
-    // This function is only used by the user logged in
-    // But it is used all the time.
-
-    @delegate:Transient
-    val verifiedFollowKeySet: Set<HexKey> by lazy {
-        tags.mapNotNullTo(HashSet()) {
-            try {
-                if (it.size > 1 && it[0] == "p") {
+    /**
+     * Returns a list of p-tags that are verified as hex keys.
+     */
+    fun verifiedFollowKeySet(): Set<HexKey> =
+        tags.mapNotNullTo(mutableSetOf()) {
+            if (it.size > 1 && it[0] == "p") {
+                try {
                     decodePublicKey(it[1]).toHexKey()
-                } else {
+                } catch (e: Exception) {
+                    Log.w("ContactListEvent", "Can't parse p-tag $it in the contact list of $pubKey with id $id", e)
                     null
                 }
-            } catch (e: Exception) {
-                Log.w("ContactListEvent", "Can't parse tags as a follows: ${it[1]}", e)
+            } else {
                 null
             }
         }
-    }
 
-    @delegate:Transient
-    val verifiedFollowTagSet: Set<String> by lazy {
-        unverifiedFollowTagSet().map { it.lowercase() }.toSet()
-    }
-
-    @delegate:Transient
-    val verifiedFollowGeohashSet: Set<String> by lazy {
-        unverifiedFollowGeohashSet().map { it.lowercase() }.toSet()
-    }
-
-    @delegate:Transient
-    val verifiedFollowCommunitySet: Set<String> by lazy { unverifiedFollowAddressSet().toSet() }
-
-    @delegate:Transient
-    val verifiedFollowKeySetAndMe: Set<HexKey> by lazy { verifiedFollowKeySet + pubKey }
+    /**
+     * Returns a list of a-tags that are verified as correct.
+     */
+    fun verifiedFollowAddressSet(): Set<HexKey> =
+        tags
+            .mapNotNullTo(mutableSetOf()) {
+                if (it.size > 1 && it[0] == "a") {
+                    ATag.parse(it[1], null)?.toTag()
+                } else {
+                    null
+                }
+            }
 
     fun unverifiedFollowKeySet() = tags.filter { it.size > 1 && it[0] == "p" }.mapNotNull { it.getOrNull(1) }
 
@@ -105,7 +100,7 @@ class ContactListEvent(
             }
         }
 
-    fun followsTags() = tags.filter { it.size > 1 && it[0] == "t" }.mapNotNull { it.getOrNull(1) }
+    fun followsTags() = hashtags()
 
     fun relays(): Map<String, ReadWrite>? =
         try {
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/DraftEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/DraftEvent.kt
index 7d19975df..db0274e36 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/DraftEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/DraftEvent.kt
@@ -25,6 +25,7 @@ import com.vitorpamplona.quartz.encoders.ATag
 import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.signers.NostrSigner
 import com.vitorpamplona.quartz.utils.TimeUtils
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 
 @Immutable
 class DraftEvent(
@@ -37,6 +38,10 @@ class DraftEvent(
 ) : BaseAddressableEvent(id, pubKey, createdAt, KIND, tags, content, sig) {
     @Transient private var cachedInnerEvent: Map<HexKey, Event?> = mapOf()
 
+    override fun countMemory(): Long =
+        super.countMemory() +
+            32 + (cachedInnerEvent.values.sumOf { pointerSizeInBytes + (it?.countMemory() ?: 0) })
+
     override fun isContentEncoded() = true
 
     fun isDeleted() = content == ""
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/Event.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/Event.kt
index 9c462846c..7437daf8a 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/Event.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/Event.kt
@@ -44,6 +44,7 @@ import com.vitorpamplona.quartz.encoders.toHexKey
 import com.vitorpamplona.quartz.signers.NostrSigner
 import com.vitorpamplona.quartz.utils.TimeUtils
 import com.vitorpamplona.quartz.utils.bytesUsedInMemory
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 import java.math.BigDecimal
 import java.security.MessageDigest
 
@@ -60,10 +61,11 @@ open class Event(
     override fun isContentEncoded() = false
 
     override fun countMemory(): Long =
-        12L +
+        7 * pointerSizeInBytes + // 7 fields, 4 bytes each reference (32bit)
+            12L + // createdAt + kind
             id.bytesUsedInMemory() +
             pubKey.bytesUsedInMemory() +
-            tags.sumOf { it.sumOf { it.bytesUsedInMemory() } } +
+            tags.sumOf { pointerSizeInBytes + it.sumOf { pointerSizeInBytes + it.bytesUsedInMemory() } } +
             content.bytesUsedInMemory() +
             sig.bytesUsedInMemory()
 
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/GalleryListEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/GalleryListEvent.kt
index 808155184..97f5da251 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/GalleryListEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/GalleryListEvent.kt
@@ -60,7 +60,7 @@ class GalleryListEvent(
             createdAt: Long = TimeUtils.now(),
             onReady: (GalleryListEvent) -> Unit,
         ) {
-            var tags = arrayOf(tagName, url, eventid)
+            val tags = arrayOf(tagName, url, eventid)
             if (relay != null) {
                 tags + relay
             }
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/GeneralListEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/GeneralListEvent.kt
index 6256e7eca..f26b9f3bc 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/GeneralListEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/GeneralListEvent.kt
@@ -26,6 +26,8 @@ import com.fasterxml.jackson.module.kotlin.readValue
 import com.vitorpamplona.quartz.encoders.ATag
 import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.signers.NostrSigner
+import com.vitorpamplona.quartz.utils.bytesUsedInMemory
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 import kotlinx.collections.immutable.ImmutableSet
 import kotlinx.collections.immutable.toImmutableSet
 import java.util.HashSet
@@ -42,6 +44,10 @@ abstract class GeneralListEvent(
 ) : BaseAddressableEvent(id, pubKey, createdAt, kind, tags, content, sig) {
     @Transient private var privateTagsCache: Array<Array<String>>? = null
 
+    override fun countMemory(): Long =
+        super.countMemory() +
+            pointerSizeInBytes + (privateTagsCache?.sumOf { pointerSizeInBytes + it.sumOf { pointerSizeInBytes + it.bytesUsedInMemory() } } ?: 0)
+
     override fun isContentEncoded() = true
 
     fun category() = dTag()
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/GiftWrapEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/GiftWrapEvent.kt
index 7e98dcd4b..b0e2e0ab8 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/GiftWrapEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/GiftWrapEvent.kt
@@ -26,6 +26,7 @@ import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.signers.NostrSigner
 import com.vitorpamplona.quartz.signers.NostrSignerInternal
 import com.vitorpamplona.quartz.utils.TimeUtils
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 
 @Immutable
 class GiftWrapEvent(
@@ -38,6 +39,10 @@ class GiftWrapEvent(
 ) : Event(id, pubKey, createdAt, KIND, tags, content, sig) {
     @Transient private var cachedInnerEvent: Map<HexKey, Event?> = mapOf()
 
+    override fun countMemory(): Long =
+        super.countMemory() +
+            32 + (cachedInnerEvent.values.sumOf { pointerSizeInBytes + (it?.countMemory() ?: 0) }) // rough calculation
+
     fun copyNoContent(): GiftWrapEvent {
         val copy =
             GiftWrapEvent(
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapEvent.kt
index 67a49a68c..e0dff9863 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapEvent.kt
@@ -24,6 +24,7 @@ import android.util.Log
 import androidx.compose.runtime.Immutable
 import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.encoders.LnInvoiceUtil
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 
 @Immutable
 class LnZapEvent(
@@ -38,6 +39,10 @@ class LnZapEvent(
     // This event is also kept in LocalCache (same object)
     @Transient val zapRequest: LnZapRequestEvent?
 
+    override fun countMemory(): Long =
+        super.countMemory() +
+            pointerSizeInBytes + (zapRequest?.countMemory() ?: 0) // rough calculation
+
     override fun containedPost(): LnZapRequestEvent? =
         try {
             description()?.ifBlank { null }?.let { fromJson(it) } as? LnZapRequestEvent
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapPaymentRequestEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapPaymentRequestEvent.kt
index 1727b0705..3efd97eaf 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapPaymentRequestEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapPaymentRequestEvent.kt
@@ -29,6 +29,8 @@ import com.fasterxml.jackson.databind.deser.std.StdDeserializer
 import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.signers.NostrSigner
 import com.vitorpamplona.quartz.utils.TimeUtils
+import com.vitorpamplona.quartz.utils.bytesUsedInMemory
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 
 @Immutable
 class LnZapPaymentRequestEvent(
@@ -42,6 +44,10 @@ class LnZapPaymentRequestEvent(
     // Once one of an app user decrypts the payment, all users else can see it.
     @Transient private var lnInvoice: String? = null
 
+    override fun countMemory(): Long =
+        super.countMemory() +
+            pointerSizeInBytes + (lnInvoice?.bytesUsedInMemory() ?: 0) // rough calculation
+
     fun walletServicePubKey() = tags.firstOrNull { it.size > 1 && it[0] == "p" }?.get(1)
 
     fun talkingWith(oneSideHex: String): HexKey = if (pubKey == oneSideHex) walletServicePubKey() ?: pubKey else pubKey
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapPaymentResponseEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapPaymentResponseEvent.kt
index 45e1320b1..60c83dc13 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapPaymentResponseEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapPaymentResponseEvent.kt
@@ -29,6 +29,8 @@ import com.fasterxml.jackson.databind.JsonNode
 import com.fasterxml.jackson.databind.deser.std.StdDeserializer
 import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.signers.NostrSigner
+import com.vitorpamplona.quartz.utils.bytesUsedInMemory
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 
 @Immutable
 class LnZapPaymentResponseEvent(
@@ -42,6 +44,8 @@ class LnZapPaymentResponseEvent(
     // Once one of an app user decrypts the payment, all users else can see it.
     @Transient private var response: Response? = null
 
+    override fun countMemory(): Long = super.countMemory() + pointerSizeInBytes + (response?.countMemory() ?: 0)
+
     fun requestAuthor() = tags.firstOrNull { it.size > 1 && it[0] == "p" }?.get(1)
 
     fun requestId() = tags.firstOrNull { it.size > 1 && it[0] == "e" }?.get(1)
@@ -91,7 +95,9 @@ class LnZapPaymentResponseEvent(
 // RESPONSE OBJECTS
 abstract class Response(
     @JsonProperty("result_type") val resultType: String,
-)
+) {
+    abstract fun countMemory(): Long
+}
 
 // PayInvoice Call
 
@@ -100,7 +106,11 @@ class PayInvoiceSuccessResponse(
 ) : Response("pay_invoice") {
     class PayInvoiceResultParams(
         val preimage: String,
-    )
+    ) {
+        fun countMemory(): Long = pointerSizeInBytes + preimage.bytesUsedInMemory()
+    }
+
+    override fun countMemory(): Long = pointerSizeInBytes + (result?.countMemory() ?: 0)
 }
 
 class PayInvoiceErrorResponse(
@@ -109,7 +119,11 @@ class PayInvoiceErrorResponse(
     class PayInvoiceErrorParams(
         val code: ErrorType?,
         val message: String?,
-    )
+    ) {
+        fun countMemory(): Long = pointerSizeInBytes + pointerSizeInBytes + (message?.bytesUsedInMemory() ?: 0)
+    }
+
+    override fun countMemory(): Long = pointerSizeInBytes + (error?.countMemory() ?: 0)
 
     enum class ErrorType {
         @JsonProperty(value = "RATE_LIMITED")
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapRequestEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapRequestEvent.kt
index 33727f11b..ee3096b0e 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapRequestEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapRequestEvent.kt
@@ -29,6 +29,7 @@ import com.vitorpamplona.quartz.encoders.hexToByteArray
 import com.vitorpamplona.quartz.signers.NostrSigner
 import com.vitorpamplona.quartz.signers.NostrSignerInternal
 import com.vitorpamplona.quartz.utils.TimeUtils
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 import java.nio.charset.Charset
 import java.security.SecureRandom
 import javax.crypto.BadPaddingException
@@ -47,6 +48,8 @@ class LnZapRequestEvent(
 ) : Event(id, pubKey, createdAt, KIND, tags, content, sig) {
     @Transient private var privateZapEvent: LnZapPrivateEvent? = null
 
+    override fun countMemory(): Long = super.countMemory() + pointerSizeInBytes + (privateZapEvent?.countMemory() ?: 0)
+
     fun zappedPost() = tags.filter { it.size > 1 && it[0] == "e" }.map { it[1] }
 
     fun zappedAuthor() = tags.filter { it.size > 1 && it[0] == "p" }.map { it[1] }
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/MuteListEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/MuteListEvent.kt
index a1e556813..a945a9294 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/MuteListEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/MuteListEvent.kt
@@ -24,6 +24,8 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.signers.NostrSigner
 import com.vitorpamplona.quartz.utils.TimeUtils
+import com.vitorpamplona.quartz.utils.bytesUsedInMemory
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 import kotlinx.collections.immutable.ImmutableSet
 
 @Immutable
@@ -39,6 +41,11 @@ class MuteListEvent(
 
     @Transient var publicAndPrivateWordCache: ImmutableSet<String>? = null
 
+    override fun countMemory(): Long =
+        super.countMemory() +
+            pointerSizeInBytes + (publicAndPrivateUserCache?.sumOf { pointerSizeInBytes + it.bytesUsedInMemory() } ?: 0) +
+            pointerSizeInBytes + (publicAndPrivateWordCache?.sumOf { pointerSizeInBytes + it.bytesUsedInMemory() } ?: 0)
+
     override fun dTag() = FIXED_D_TAG
 
     fun publicAndPrivateUsersAndWords(
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/NIP90ContentDiscoveryResponseEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/NIP90ContentDiscoveryResponseEvent.kt
index 9e0ba0500..a2c1feb72 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/NIP90ContentDiscoveryResponseEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/NIP90ContentDiscoveryResponseEvent.kt
@@ -26,6 +26,8 @@ import com.fasterxml.jackson.module.kotlin.readValue
 import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.signers.NostrSigner
 import com.vitorpamplona.quartz.utils.TimeUtils
+import com.vitorpamplona.quartz.utils.bytesUsedInMemory
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 
 @Immutable
 class NIP90ContentDiscoveryResponseEvent(
@@ -38,6 +40,10 @@ class NIP90ContentDiscoveryResponseEvent(
 ) : Event(id, pubKey, createdAt, KIND, tags, content, sig) {
     @Transient var events: List<HexKey>? = null
 
+    override fun countMemory(): Long =
+        super.countMemory() +
+            pointerSizeInBytes + (events?.sumOf { it.bytesUsedInMemory() } ?: 0)
+
     fun innerTags(): List<HexKey> {
         if (content.isEmpty()) {
             return listOf()
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/OtsEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/OtsEvent.kt
index 6dccecdaf..cefea7c98 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/OtsEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/OtsEvent.kt
@@ -33,6 +33,7 @@ import com.vitorpamplona.quartz.ots.VerifyResult
 import com.vitorpamplona.quartz.ots.op.OpSHA256
 import com.vitorpamplona.quartz.signers.NostrSigner
 import com.vitorpamplona.quartz.utils.TimeUtils
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 import kotlinx.coroutines.CancellationException
 import java.util.Base64
 
@@ -48,6 +49,10 @@ class OtsEvent(
     @Transient
     var verifiedTime: Long? = null
 
+    override fun countMemory(): Long =
+        super.countMemory() +
+            pointerSizeInBytes + Long.SIZE_BYTES // verifiedTime
+
     override fun isContentEncoded() = true
 
     fun digestEvent() = tags.firstOrNull { it.size > 1 && it[0] == "e" }?.get(1)
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/PeopleListEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/PeopleListEvent.kt
index c872f2d06..066822565 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/PeopleListEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/PeopleListEvent.kt
@@ -24,6 +24,8 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.signers.NostrSigner
 import com.vitorpamplona.quartz.utils.TimeUtils
+import com.vitorpamplona.quartz.utils.bytesUsedInMemory
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 import kotlinx.collections.immutable.ImmutableSet
 
 @Immutable
@@ -39,6 +41,11 @@ class PeopleListEvent(
 
     @Transient var publicAndPrivateWordCache: ImmutableSet<String>? = null
 
+    override fun countMemory(): Long =
+        super.countMemory() +
+            pointerSizeInBytes + (publicAndPrivateUserCache?.sumOf { pointerSizeInBytes + it.bytesUsedInMemory() } ?: 0) +
+            pointerSizeInBytes + (publicAndPrivateWordCache?.sumOf { pointerSizeInBytes + it.bytesUsedInMemory() } ?: 0)
+
     fun publicAndPrivateWords(
         signer: NostrSigner,
         onReady: (ImmutableSet<String>) -> Unit,
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/PrivateDmEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/PrivateDmEvent.kt
index 6dd21b030..83b8d8770 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/PrivateDmEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/PrivateDmEvent.kt
@@ -27,6 +27,8 @@ import com.vitorpamplona.quartz.encoders.HexValidator
 import com.vitorpamplona.quartz.encoders.Nip54InlineMetadata
 import com.vitorpamplona.quartz.signers.NostrSigner
 import com.vitorpamplona.quartz.utils.TimeUtils
+import com.vitorpamplona.quartz.utils.bytesUsedInMemory
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 import kotlinx.collections.immutable.persistentSetOf
 
 @Immutable
@@ -41,6 +43,10 @@ class PrivateDmEvent(
     ChatroomKeyable {
     @Transient private var decryptedContent: Map<HexKey, String> = mapOf()
 
+    override fun countMemory(): Long =
+        super.countMemory() +
+            pointerSizeInBytes + (decryptedContent.values.sumOf { pointerSizeInBytes + it.bytesUsedInMemory() })
+
     override fun isContentEncoded() = true
 
     /**
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/PrivateOutboxRelayListEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/PrivateOutboxRelayListEvent.kt
index 07551542a..a26f54c05 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/PrivateOutboxRelayListEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/PrivateOutboxRelayListEvent.kt
@@ -27,6 +27,8 @@ import com.vitorpamplona.quartz.encoders.ATag
 import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.signers.NostrSigner
 import com.vitorpamplona.quartz.utils.TimeUtils
+import com.vitorpamplona.quartz.utils.bytesUsedInMemory
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 
 @Immutable
 class PrivateOutboxRelayListEvent(
@@ -39,6 +41,10 @@ class PrivateOutboxRelayListEvent(
 ) : BaseAddressableEvent(id, pubKey, createdAt, KIND, tags, content, sig) {
     @Transient private var privateTagsCache: Array<Array<String>>? = null
 
+    override fun countMemory(): Long =
+        super.countMemory() +
+            pointerSizeInBytes + (privateTagsCache?.sumOf { pointerSizeInBytes + it.sumOf { pointerSizeInBytes + it.bytesUsedInMemory() } } ?: 0)
+
     override fun dTag() = FIXED_D_TAG
 
     fun relays(): List<String>? =
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/SealedGossipEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/SealedGossipEvent.kt
index 1ca4af9c6..d6b92a8e1 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/SealedGossipEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/SealedGossipEvent.kt
@@ -27,6 +27,7 @@ import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.encoders.toHexKey
 import com.vitorpamplona.quartz.signers.NostrSigner
 import com.vitorpamplona.quartz.utils.TimeUtils
+import com.vitorpamplona.quartz.utils.pointerSizeInBytes
 
 @Immutable
 class SealedGossipEvent(
@@ -39,6 +40,10 @@ class SealedGossipEvent(
 ) : WrappedEvent(id, pubKey, createdAt, KIND, tags, content, sig) {
     @Transient private var cachedInnerEvent: Map<HexKey, Event?> = mapOf()
 
+    override fun countMemory(): Long =
+        super.countMemory() +
+            pointerSizeInBytes + cachedInnerEvent.values.sumOf { pointerSizeInBytes + (it?.countMemory() ?: 0) }
+
     fun copyNoContent(): SealedGossipEvent {
         val copy =
             SealedGossipEvent(
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/utils/StringUtils.kt b/quartz/src/main/java/com/vitorpamplona/quartz/utils/StringUtils.kt
index 305d487be..085856d6f 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/utils/StringUtils.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/utils/StringUtils.kt
@@ -22,7 +22,11 @@ package com.vitorpamplona.quartz.utils
 
 import kotlin.math.min
 
-fun String.bytesUsedInMemory(): Int = (8 * ((((this.length) * 2) + 45) / 8))
+val pointerSizeInBytes = 4
+
+fun String.bytesUsedInMemory(): Long = (8 * (((this.length * 2L) + 45) / 8))
+
+fun Boolean.bytesUsedInMemory(): Long = 8
 
 fun String.containsIgnoreCase(term: String): Boolean {
     if (term.isEmpty()) return true // Empty string is contained