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Chris Lu
8f29d0a91e
* route log buffer flush copies through the shared slab pool Each flush copied the sealed window into a bytes.Buffer drawn from a package-local sync.Pool. GC drains that pool, so once collections run often (e.g. under GOMEMLIMIT) most flushes miss and Write grows a fresh window-sized array, the dominant bytes.growSlice source under write load. Copy into a size-classed slab from weed/util/mem instead. Slabs are reused process-wide and returned to their exact size class after the flush, so variable-sized flushes across many partitions stop churning mismatched buffers. * guard nil slab in flush releaseMemory mem.Free(nil) resolves to the smallest slot pool and stores a zero-cap slice, so a later mem.Allocate could return nil and panic. The current call sites never pass nil, but the guard keeps a double release harmless.