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Merge #14802: rpc: faster getblockstats using BlockUndo data

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d20d756752 rpc: faster getblockstats using BlockUndo data (Felix Weis)

Pull request description:

  Using undo data for a block (rev?????.dat) we can retrieve value information about prevouts and calculate the final transaction fee (rate). This approach is about 80x faster, drops the requirement for `-txindex`, and works for all non-pruned blocks.

  ```
  # 2018-11-25T16:36:19Z Bitcoin Core version v0.17.99.0-edc715240-dirty (release build)
  seq 550100 550200  0.00s user 0.00s system 62% cpu 0.004 total
  xargs -n1 src/bitcoin-cli getblockstats  0.21s user 0.19s system 17% cpu 2.302 total

  # 2018-11-25T16:39:17Z Bitcoin Core version v0.17.0 (release build)
  seq 550100 550200  0.00s user 0.00s system 87% cpu 0.002 total
  xargs -n1 src/bitcoin-cli getblockstats  0.24s user 0.22s system 0% cpu 3:19.42 total
  ```

ACKs for commit d20d75:
  MarcoFalke:
    re-utACK d20d756752

Tree-SHA512: 5babc3eb8d2fee2cb23dc12f522656b80737a540cbf2b13390a8f388304c46c064cca76f896b46a6e2abae8cc582d28e1ab20dd4bb17ad6142f20630c2d30c54
This commit is contained in:
MarcoFalke
2019-05-10 13:20:41 -04:00
parent 14959753a4 d20d756752
commit e2371f842f
4 changed files with 174 additions and 187 deletions
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doc/release-notes-14802.md Normal file
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RPC changes
-----------
The `getblockstats` RPC is faster for fee calculation by using BlockUndo data. Also, `-txindex` is no longer required and `getblockstats` works for all non-pruned blocks.