perf: reduce busybox init-time memory allocation#19952
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perf: reduce busybox init-time memory allocation#19952
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Reduce init-time memory for the busybox binary by eliminating unnecessary imports, deferring allocations with sync.OnceValue, and breaking heavy transitive dependency chains. Results (Linux amd64): - Busybox: 16.1 MB -> 12.9 MB heap (-20%), 245K -> 173K mallocs (-29%) - AC standalone: 9.1 MB -> 7.2 MB heap (-21%), 87K -> 51K mallocs (-41%) - Binary size: 205 MB -> 194 MB (-5%) Generated with assistance from AI Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Test files with sql_integration build tag reference schema vars that are now sync.OnceValue functions. Add () to all schema.XxxSchema and pkgSchema.XxxSchema references in test files. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Each zap logger created with sampling enabled allocates a counters [7][4096]counter array (~450 KB). With 100+ loggers across sensor's dependency tree, this totals ~46 MB of heap (40% of sensor's runtime memory at 128Mi limit). Remove per-logger sampling from the zap config. This trades potential log volume increase for massive memory savings. On an idle cluster, sensor's heap drops from ~115 MB to ~69 MB. For edge deployments with tight memory limits, this is critical — it enables sensor to run at ~50 Mi instead of ~82 Mi. Generated with assistance from AI Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Description
Reduce init-time memory for the busybox binary and all components by eliminating unnecessary imports, deferring allocations with sync.OnceValue, and breaking heavy transitive dependency chains.
Results (Linux amd64):
User-facing documentation
Testing and quality
Automated testing
How I validated my change
Heap profiling with pprof in Linux amd64 containers via podman.
🤖 Generated with Claude Code