yusing 077e0bc03b perf(accesslog): use buffer pool in BackScanner to reduce allocations ...

Replace per-scan byte slice allocations with a sized buffer pool,
significantly reducing memory pressure during log file scanning.

- Add Release() method to return buffers to pool (callers must invoke)
- Remove Reset() method - create new scanner instead for simpler lifecycle
- Refactor chunk prepending to reuse pooled buffers instead of append

Benchmark results show allocations dropped from ~26k to 1 per scan
for small chunk sizes, with better throughput.

BREAKING CHANGE: Reset() removed; callers must call Release() and
create a new BackScanner instance instead.

2026-01-19 14:32:42 +08:00

2.9 KiB

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