Thomas Camlong
ab5b8dad43
Closes the last unexplained part of the peak footprint. The 118.8 MiB 'other
anonymous' smaps bucket is now mostly accounted for: V8 large-object space 34.5,
external buffers 24.6, and ~38 MiB of V8 parser/compiler zone memory that was freed
back to malloc but never returned to the kernel by musl - peak_malloced_memory goes
4.6 -> 42.2 MiB at board load while current malloced_memory stays at 1.0.
Two theories tested and rejected rather than asserted:
- 'Fewer loaded files means less compiler zone memory, so shipping less server JS
pays twice.' Wrong. peak_malloced_memory is identical (42.1-42.5) across the
preloadEntriesOnStart A/B despite 310 fewer files. The spike is a fixed cost of
the board route, not a per-file one. Claim withdrawn.
- Orphaned zlib streams. Next documents this leak class and the fix is absent from
this build, and a peak snapshot showed 15 Gzip objects still present at idle -
which read as accumulation. getActiveResourcesInfo() reports Zlib=0 both at
baseline and after 300 deliberately aborted gzip requests, RSS flat. Snapshot
objects are not live native handles, and nginx buffers responses so Next never
sees the mid-response disconnect that orphans a stream.
Adds a /handles endpoint to the probe, which is what settled the second one.
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