Following improvements implemented: - Switch over `String` replaced with switch single char - Binary search for frames in `StackMapGenerator` - `StackMapGenerator.rawHandlers` with pre-calculated offsets - `ClassEntry` is caching `ClassDesc` symbol - Caching of type symbols in `NameAndTypeEntry` and `MethodTypeEntry` - Caching `MethodTypeDesc` in `MethodInfo` implementations - `StackMapGenerator` and `Utils` delegating to cached `MethodTypeDesc` instead of custom parsing
No API change. Benchmarks show stack map generation improved by 21% and code generation from symbols improved by 30%. Benchmark Mode Cnt Score Error Units GenerateStackMaps.benchmark thrpt 10 407931.202 ± 13101.023 ops/s RebuildMethodBodies.shared thrpt 4 10258.597 ± 383.699 ops/s RebuildMethodBodies.unshared thrpt 4 7224.543 ± 256.800 ops/s Benchmark Mode Cnt Score Error Units GenerateStackMaps.benchmark thrpt 10 495101.110 ± 2389.628 ops/s RebuildMethodBodies.shared thrpt 4 13380.272 ± 810.113 ops/s RebuildMethodBodies.unshared thrpt 4 9399.863 ± 557.060 ops/s ------------- Commit messages: - Merge branch 'master' of https://github.com/openjdk/jdk into JDK-8306842-perf-improvements - more use of MethodInfo::methodTypeSymbol and faster ClassDesc slot size calculation - merge from master - StackMapGenerator::processInvokeInstructions uses cached MethodTypeDesc - caching MethodTypeDesc in MethodInfo implementations and improved Util methods - getting symbols from NaTEntry moved to new Util::fieldTypeSymbol and Util::methodTypeSymbol methods - new RebuildMethodBodies benchmark - fixed Util::entryList - Apply suggestions from code review - caching type symbols in NameAndTypeEntry and MethodTypeEntry - ... and 16 more: https://git.openjdk.org/jdk/compare/a05560d9...ca4c00d4 Changes: https://git.openjdk.org/jdk/pull/13671/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13671&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8306842 Stats: 476 lines in 23 files changed: 283 ins; 83 del; 110 mod Patch: https://git.openjdk.org/jdk/pull/13671.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/13671/head:pull/13671 PR: https://git.openjdk.org/jdk/pull/13671
