From 9e94310604a0f627610e49c3ea306b112e7c95d8 Mon Sep 17 00:00:00 2001
From: fiatjaf <fiatjaf@gmail.com>
Date: Fri, 7 Mar 2025 21:45:47 -0300
Subject: [PATCH] ridiculous performance string and serialization performance
 improvements.

---
 envelopes_sonic.go |  3 ++-
 event.go           | 16 ++++++++--------
 event_easyjson.go  |  4 ++--
 go.mod             |  1 +
 go.sum             |  2 ++
 helpers.go         |  5 +++--
 6 files changed, 18 insertions(+), 13 deletions(-)

diff --git a/envelopes_sonic.go b/envelopes_sonic.go
index db0db25..3851f31 100644
--- a/envelopes_sonic.go
+++ b/envelopes_sonic.go
@@ -7,6 +7,7 @@ import (
 	"unsafe"
 
 	"github.com/bytedance/sonic/ast"
+	"github.com/colduction/nocopy"
 )
 
 type sonicVisitorPosition int
@@ -549,7 +550,7 @@ func (smp sonicMessageParser) ParseMessage(message []byte) (Envelope, error) {
 	sv := &sonicVisitor{smp: &smp}
 	sv.whereWeAre = inEnvelope
 
-	err := ast.Preorder(string(message), sv, nil)
+	err := ast.Preorder(nocopy.ByteSliceToString(message), sv, nil)
 
 	return sv.mainEnvelope, err
 }
diff --git a/event.go b/event.go
index e702626..7303bf6 100644
--- a/event.go
+++ b/event.go
@@ -3,7 +3,7 @@ package nostr
 import (
 	"crypto/sha256"
 	"encoding/hex"
-	"fmt"
+	"strconv"
 
 	"github.com/mailru/easyjson"
 )
@@ -60,13 +60,13 @@ func (evt *Event) Serialize() []byte {
 
 	// the header portion is easy to serialize
 	// [0,"pubkey",created_at,kind,[
-	dst = append(dst, []byte(
-		fmt.Sprintf(
-			"[0,\"%s\",%d,%d,",
-			evt.PubKey,
-			evt.CreatedAt,
-			evt.Kind,
-		))...)
+	dst = append(dst, "[0,\""...)
+	dst = append(dst, evt.PubKey...)
+	dst = append(dst, "\","...)
+	dst = append(dst, strconv.FormatInt(int64(evt.CreatedAt), 10)...)
+	dst = append(dst, ',')
+	dst = append(dst, strconv.Itoa(evt.Kind)...)
+	dst = append(dst, ',')
 
 	// tags
 	dst = evt.Tags.marshalTo(dst)
diff --git a/event_easyjson.go b/event_easyjson.go
index 8888b9c..a805222 100644
--- a/event_easyjson.go
+++ b/event_easyjson.go
@@ -69,7 +69,7 @@ func easyjsonF642ad3eDecodeGithubComNbdWtfGoNostr(in *jlexer.Lexer, out *Event)
 						}
 						for !in.IsDelim(']') {
 							var v2 string
-							v2 = string(in.String())
+							v2 = in.String()
 							v1 = append(v1, v2)
 							in.WantComma()
 						}
@@ -134,7 +134,7 @@ func easyjsonF642ad3eEncodeGithubComNbdWtfGoNostr(out *jwriter.Writer, in Event)
 				if v5 > 0 {
 					out.RawByte(',')
 				}
-				out.String(string(v6))
+				out.String(v6)
 			}
 			out.RawByte(']')
 		}
diff --git a/go.mod b/go.mod
index 8c960c9..8841361 100644
--- a/go.mod
+++ b/go.mod
@@ -11,6 +11,7 @@ require (
 	github.com/bytedance/sonic v1.13.1
 	github.com/cloudwego/base64x v0.1.5
 	github.com/coder/websocket v1.8.12
+	github.com/colduction/nocopy v0.2.0
 	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0
 	github.com/dgraph-io/badger/v4 v4.5.0
 	github.com/dgraph-io/ristretto v1.0.0
diff --git a/go.sum b/go.sum
index e904b42..7f6fa09 100644
--- a/go.sum
+++ b/go.sum
@@ -66,6 +66,8 @@ github.com/cmars/basen v0.0.0-20150613233007-fe3947df716e/go.mod h1:P13beTBKr5Q1
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/coder/websocket v1.8.12 h1:5bUXkEPPIbewrnkU8LTCLVaxi4N4J8ahufH2vlo4NAo=
 github.com/coder/websocket v1.8.12/go.mod h1:LNVeNrXQZfe5qhS9ALED3uA+l5pPqvwXg3CKoDBB2gs=
+github.com/colduction/nocopy v0.2.0 h1:9jMLCmIP/wnAWO0FfSXJ4h5HBRe6cBqIqacWw/5sRXY=
+github.com/colduction/nocopy v0.2.0/go.mod h1:MO+QBkEnsZYE7QukMAcAq4b0rHpSxOTlVqD3fI34YJs=
 github.com/davecgh/go-spew v0.0.0-20171005155431-ecdeabc65495/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
diff --git a/helpers.go b/helpers.go
index 5370827..b9c55ce 100644
--- a/helpers.go
+++ b/helpers.go
@@ -7,6 +7,7 @@ import (
 	"sync"
 	"unsafe"
 
+	"github.com/colduction/nocopy"
 	jsoniter "github.com/json-iterator/go"
 	"golang.org/x/exp/constraints"
 )
@@ -134,7 +135,7 @@ func extractSubID(jsonStr []byte) string {
 	end := bytes.Index(jsonStr[start:], []byte{'"'})
 
 	// get the contents
-	return string(jsonStr[start : start+end])
+	return nocopy.ByteSliceToString(jsonStr[start : start+end])
 }
 
 func extractEventID(jsonStr []byte) string {
@@ -149,5 +150,5 @@ func extractEventID(jsonStr []byte) string {
 	start += 4 + offset + 1
 
 	// get 64 characters of the id
-	return string(jsonStr[start : start+64])
+	return nocopy.ByteSliceToString(jsonStr[start : start+64])
 }