rm-hull / jasengo / 30310235916

80%

main: 78%

Build Type

Pull #27

github

Committed by rm-hull

Commit Message

perf: Reduce string and slice allocations (#21)

Optimize Sequence and SepBy1 combinators to pre-allocate result slices
with exact capacity, reducing GC pressure and improving throughput.

Changes:
- Sequence: pre-allocate results slice with capacity = len(ps)
- SepBy1: pre-allocate result slice with capacity = len(rest)+1

Benchmark improvements:
- Sequence: 21→17 allocs, 17488→17248 B/op
- SyslogParse: 840→828 allocs
- ParseAttributes: 179→165 allocs, 10504→10056 B/op
- ParseDates: 77→72 allocs, 6571→6361 B/op

Note: Many pre-allocation was attempted but reverted as it caused
regressions in benchmarks with few iterations.

Pull Request Pull Request #27: perf: Reduce string and slice allocations (#21)

Coverage Stats

2 of 7 new or added lines in 1 file covered. (28.57%)

1 existing line in 1 file now uncovered.

475 of 593 relevant lines covered (80.1%)

174704.44 hits per line