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perf: cheap per-frame and per-fetch savings (#725)

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Six small savings with no behaviour change: the odds fetch no longer pretty-prints every response for a debug line; the scroll integer-slice path drops a redundant full-frame np.ascontiguousarray; ledmatrix-web.service gets MALLOC_ARENA_MAX=2 like the display unit; core ESPN responses are parsed via response_json (orjson when installed); and the scroll frame stats go to INFO only for degraded windows plus a 5-minute heartbeat.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Chuck
2026-10-03 14:26:03 -04:00
committed by GitHub
co-authored by Claude Opus 5.5
parent 7bb85c0356
commit ed0753c1ca
12 changed files with 261 additions and 32 deletions
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systemd/ledmatrix-web.service
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@@ -19,6 +19,11 @@ Type=simple
User=__USER__
WorkingDirectory=__PROJECT_ROOT_DIR__
Environment=USE_THREADING=1
# Cap glibc's malloc arenas, as ledmatrix.service does: each allocating thread
# can get its own arena, up to 8 x CPU count (24 on a 3-core Pi), and a grown
# arena is never handed back to the OS. This threaded Flask process would hold
# that memory the same way. See ledmatrix.service for the measurement.
Environment=MALLOC_ARENA_MAX=2
ExecStart=/usr/bin/python3 __PROJECT_ROOT_DIR__/scripts/utils/start_web_conditionally.py
Restart=on-failure
RestartSec=10