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tendermint/CHANGELOG_PENDING.md
mmsqe e80dd00894 backport: performance improvements for the event query API (#7319) (#9334) 
* Performance improvements for the event query API (#7319)

Rework the implementation of event query parsing and execution to
improve performance and reduce memory usage.

Previous memory and CPU profiles of the pubsub service showed query
processing as a significant hotspot. While we don't have evidence that
this is visibly hurting users, fixing it is fairly easy and self-contained.

Updates #6439.

Typical benchmark results comparing the original implementation (PEG) with the reworked implementation (Custom):
```
TEST                        TIME/OP  BYTES/OP  ALLOCS/OP  SPEEDUP   MEM SAVING
BenchmarkParsePEG-12       51716 ns  526832    27
BenchmarkParseCustom-12     2167 ns    4616    17         23.8x     99.1%
BenchmarkMatchPEG-12        3086 ns    1097    22
BenchmarkMatchCustom-12    294.2 ns      64     3         10.5x     94.1%
```
2022-09-13 10:42:14 +02:00

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Unreleased Changes

v0.38.0

BREAKING CHANGES

  • CLI/RPC/Config

  • Apps

  • P2P Protocol

  • Go API

  • Blockchain Protocol

FEATURES

IMPROVEMENTS

  • [pubsub] #7319 Performance improvements for the event query API (@creachadair)

BUG FIXES

v0.37.0

Special thanks to external contributors on this release:

Friendly reminder, we have a bug bounty program.

BREAKING CHANGES

  • CLI/RPC/Config

    • [config] #9259 Rename the fastsync section and the fast_sync key blocksync and block_sync respectively

  • Apps

    • [abci/counter] #6684 Delete counter example app
    • [abci] #5783 Make length delimiter encoding consistent (uint64) between ABCI and P2P wire-level protocols
    • [abci] #9145 Removes unused Response/Request SetOption from ABCI (@samricotta)
    • [abci/params] #9287 Deduplicate ConsensusParams and BlockParams so only types proto definitions are used (@cmwaters)
      • Remove TimeIotaMs and use a hard-coded 1 millisecond value to ensure monotonically increasing block times.
      • Rename AppVersion to App so as to not stutter.
    • [types] #9287 Reduce the use of protobuf types in core logic. (@cmwaters)
      • ConsensusParams, BlockParams, ValidatorParams, EvidenceParams, VersionParams have become native types. They still utilize protobuf when being sent over the wire or written to disk.
      • Moved ValidateConsensusParams inside (now native type) ConsensusParams, and renamed it to ValidateBasic.
    • [abci] #9301 New ABCI methods PrepareProposal and ProcessProposal which give the app control over transactions proposed and allows for verification of proposed blocks.
    • [abci] #8216 Renamed EvidenceType to MisbehaviorType and Evidence to Misbehavior as a more accurate label of their contents. (@williambanfield, @sergio-mena)
    • [abci] #9122 Renamed LastCommitInfo to CommitInfo in preparation for vote extensions. (@cmwaters)
    • [abci] #8656, #8901 Added cli commands for PrepareProposal and ProcessProposal. (@jmalicevic, @hvanz)
    • [abci] #6403 Change the key and value fields from []byte to string in the EventAttribute type. (@alexanderbez)

  • P2P Protocol

  • Go API

    • [all] #9144 Change spelling from British English to American (@cmwaters)
      • Rename "Subscription.Cancelled()" to "Subscription.Canceled()" in libs/pubsub

  • Blockchain Protocol

FEATURES

  • [abci] #9301 New ABCI methods PrepareProposal and ProcessProposal which give the app control over transactions proposed and allows for verification of proposed blocks.

IMPROVEMENTS

  • [crypto] #9250 Update to use btcec v2 and the latest btcutil. (@wcsiu)

  • [proto] #9356 Migrate from gogo/protobuf to cosmos/gogoproto (@julienrbrt)

  • [rpc] #9276 Added header and header_by_hash queries to the RPC client (@samricotta)

  • [abci] #5706 Added AbciVersion to RequestInfo allowing applications to check ABCI version when connecting to Tendermint. (@marbar3778)

BUG FIXES

  • [consensus] #9229 fix round number of enterPropose when handling RoundStepNewRound timeout. (@fatcat22)
  • [docker] #9073 enable cross platform build using docker buildx