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CI: Nim test nimcache as immutable snapshots (shard 1 red on main) - #568

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ci-nimcache-snapshots
Oct 18, 2026
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CI: Nim test nimcache as immutable snapshots (shard 1 red on main)#568
mariusandra merged 1 commit into
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ci-nimcache-snapshots

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@mariusandra mariusandra commented Oct 18, 2026

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Shard 1 of the Nim tests fails to link on main and on every PR since this morning, with no code at fault:

@m..@s..@sapps@sdata@sclock@sapp_loader.nim.c:(.text+0x542): undefined reference to `eqdup___OOZconfig_u2307'

(main 39118817269 and #567 identical; main 39118507287 the same kind in test_refresh_interval.)

Cause. Nim reuses a module's object file when the C it generates equals the .c on disk and the .o is newer (shouldRecompile, compiler/cgen.nim). Nothing checks that the .o came from that .c. The warm cache was one shared directory per shard on /mnt/cache. Overlapping runs copied into it (rsync -a) and out of it (cp -a) at the same time, so a restore could pair one build's .c with another build's newer .o. Nim linked the stale object, and the if: always() save after the run wrote the pair back for every later run. The workflow comment assumed "Nim validates each object by hash anyway"; it doesn't.

Fix. frameos/tools/ci_nimcache.sh restore|save <shard>:

  • A save writes a new snapshot. It uses rsync --link-dest on the snapshot this job restored, so unchanged files are hardlinks and a save costs only what the run rebuilt. Then it swaps shard-N.current in one rename. Snapshots are never modified after that.
  • A restore resolves the symlink once and copies that one snapshot.
  • Replaced snapshots stay for 30 min, for restores still copying, then get pruned. A partial copy can only miss files, which costs a recompile, never a wrong pairing.
  • Hardlinks come only from the job's own restored snapshot. rsync's quick check is size+mtime, and everything the job wrote is newer than that snapshot. Linking against a snapshot another run just published could take a same-size object compiled in the same second.
  • No save on a cancelled job: a gcc killed mid-write leaves a truncated .o newer than its .c.
  • New path (nimcache/frameos-tests-snapshots): one cold build per shard, and the poisoned pairs are left behind.

Tested in a Linux container: three savers doing restore → rebuild 8 of 40 test dirs → save cycles against four restorers for 30 s. 227 restores, 0 with a test dir mixing two builds. Hardlinking and the round trip are checked too. The previous scheme under the same load: 250 of 266 restores mixed, and the shared dir itself ended up holding a mixed pair. Shellcheck clean.

Host disk: 56 G free on monster; the first snapshots take ~17 G. The old nimcache/frameos-tests/shard-{1..8} dirs (~31 G, shards 5–8 unused since the move to four shards) can be deleted once branches carry this (noted in tools/gha-runners/README.md). I haven't touched them.

🤖 Generated with Claude Code

@mariusandra @claude
CI: Nim test nimcache as immutable snapshots, so overlapping runs can…
ff8cce1 
…not mix it

Shard 1 failed to link on three runs in a row, main included
(`undefined reference to eqdup___OOZconfig_u2307` in test_runner_loop,
`eqdup___OOZjs95runtimeZapp95runtime_*` in test_refresh_interval), with no
code at fault. Nim reuses a module's object file when the C it generates
equals the .c on disk and the .o is newer (shouldRecompile in
compiler/cgen.nim); nothing checks that the .o came from that .c. The warm
cache was one shared directory per shard that overlapping runs copied
into (rsync) and out of (cp -a) at the same time, so a restore could take
one build's .c and another build's newer .o. Nim linked the stale object,
and the save after it wrote the pair back for every later run.

frameos/tools/ci_nimcache.sh keeps each shard's cache as snapshots written
once and never changed. A save rsyncs into a new snapshot with
--link-dest on the snapshot the job restored (unchanged files become
hardlinks, so a save costs only what the run rebuilt), then swaps a
`current` symlink in one rename. A restore resolves the symlink once and
copies that snapshot. Replaced snapshots live 30 minutes for restores
still copying. Hardlinks follow rsync's size + mtime check, so they come
only from the job's own restored snapshot, which every file the job wrote
is newer than. The cache moves to a new path, which also drops the
poisoned pairs. The save is skipped on a cancelled job: a gcc killed
mid-write leaves a truncated .o newer than its .c.

Stress-tested in a Linux container: three savers doing restore, rebuild,
save cycles against four restorers for 30 s, 227 restores, none with a
test dir mixing two builds. The old scheme under the same load: 250 of
266 restores mixed, and the shared directory itself ended up holding
a mixed test dir, the pair every later run would have linked.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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ESP32 firmware size

Built from cbf8647 by this run; compared with the latest release v2026.10.15.

Image This PR v2026.10.15 Δ
esp32-s3 app (OTA image) 3,154,224
87.5% of 3520K slot, 440 KB free		 3,138,272 +15,952 (+0.5%)
esp32-s3 merged flash image 3,219,760 3,203,808 +15,952 (+0.5%)
esp32-s3-32mb app (OTA image) 3,154,224
76.4% of 4032K slot, 952 KB free		 3,138,272 +15,952 (+0.5%)
esp32-s3-32mb merged flash image 3,285,296 3,269,344 +15,952 (+0.5%)

Breakdown by subsystem — esp32-s3

Subsystem This PR v2026.10.15 Δ
FrameOS core (Nim) 487,875 477,042 +10,833 (+2.3%)
QuickJS 360,345 360,373 -28 (-0.0%)
pixie 304,382 304,354 +28 (+0.0%)
Wi-Fi stack 295,296 295,304 -8 (-0.0%)
Nim stdlib 251,547 251,436 +111 (+0.0%)
FrameOS apps (Nim) 190,404 190,356 +48 (+0.0%)
ESP-IDF misc 181,395 181,564 -169 (-0.1%)
Embedded font 146,362 146,362 ±0
String pool (attributed to efuse) 136,729 136,134 +595 (+0.4%)
fos_* firmware shell (C) 136,501 132,233 +4,268 (+3.2%)
mbedTLS + certificates 132,519 132,439 +80 (+0.1%)
lwIP / HTTP / WebSocket 126,779 126,800 -21 (-0.0%)
libc / libm / newlib 116,263 116,263 ±0
Storage (SPIFFS / FatFS / SD / NVS) 94,108 94,080 +28 (+0.0%)
Nim packages (chrono, zippy, chroma, qrgen, ...) 71,933 71,849 +84 (+0.1%)
Display drivers (C) 64,962 64,946 +16 (+0.0%)
Crypto (monocypher) 35,141 35,141 ±0
Total mapped flash 3,132,541 3,116,676 +15,865 (+0.5%)
Inside each subsystem

FrameOS core (Nim) — 487,875

Part This PR v2026.10.15 Δ
frameos/js_runtime 118,440 115,444 +2,996 (+2.6%)
frameos/utils 117,350 112,401 +4,949 (+4.4%)
frameos/interpreter.nim 99,980 100,264 -284 (-0.3%)
embedded_main.nim 19,252 19,252 ±0
embedded_runtime.nim 17,830 17,834 -4 (-0.0%)
lib/tz.nim 16,722 16,722 ±0
frameos_nim_glue.c.obj 11,455 10,635 +820 (+7.7%)
frameos/planner.nim 9,689 9,681 +8 (+0.1%)
frameos/event_loop.nim 8,412 8,412 ±0
frameos/types.nim 7,909 7,909 ±0
frameos/values.nim 7,699 7,699 ±0
frameos/single_scene_host.nim 6,687 6,712 -25 (-0.4%)
frameos/apps.nim 6,585 6,585 ±0
frameos/spool.nim 5,787 5,787 ±0
frameos/input_state.nim 5,079 3,766 +1,313 (+34.9%)
embedded_scene.nim 4,945 4,945 ±0
frameos/events_gen.nim 3,926 3,948 -22 (-0.6%)
fos_netguard.c.obj 3,532 2,179 +1,353 (+62.1%)
frameos/app_config.nim 2,939 2,935 +4 (+0.1%)
frameos/reboot_reason.nim 2,648 2,648 ±0
frameos/node_config.nim 2,618 2,618 ±0
frameos/app_capabilities.nim 2,489 2,489 ±0
frameos/events.nim 2,410 2,410 ±0
frameos/refresh_interval.nim 1,635 1,639 -4 (-0.2%)
frameos/runtime_diagnostics.nim 767 767 ±0
frameos/event_log.nim 415 431 -16 (-3.7%)
fos_version.c.obj 328 328 ±0
frameos/cloud — 255 -255 (-100.0%)
frameos/channels.nim 152 152 ±0
frameos/ids.nim 137 137 ±0
frameos/hal 44 44 ±0
frameos/retired_apps.nim 14 14 ±0

QuickJS — 360,345

Part This PR v2026.10.15 Δ
quickjs.c.obj 287,826 287,846 -20 (-0.0%)
libunicode.c.obj 50,178 50,178 ±0
libregexp.c.obj 13,995 13,999 -4 (-0.0%)
dtoa.c.obj 5,681 5,685 -4 (-0.1%)
cutils.c.obj 2,141 2,141 ±0
fos_qjs_glue.c.obj 449 449 ±0
fos_quickjs_tz.c.obj 75 75 ±0

pixie — 304,382

Part This PR v2026.10.15 Δ
pixie/fontformats/opentype.nim 55,460 55,460 ±0
pixie/fileformats/webp.nim 37,493 37,493 ±0
pixie/fileformats/svg.nim 36,975 36,983 -8 (-0.0%)
pixie/paths.nim 32,895 32,875 +20 (+0.1%)
pixie/fileformats/jpeg.nim 29,424 29,436 -12 (-0.0%)
pixie/fileformats/png.nim 22,097 22,101 -4 (-0.0%)
pixie/images.nim 15,771 15,779 -8 (-0.1%)
pixie/fonts.nim 10,995 10,995 ±0
pixie/paints.nim 9,869 9,869 ±0
pixie/fileformats/bmp.nim 8,286 8,258 +28 (+0.3%)
pixie/common.nim 7,389 7,413 -24 (-0.3%)
pixie/blends.nim 6,528 6,516 +12 (+0.2%)
pixie/fileformats/gif.nim 5,957 5,965 -8 (-0.1%)
pixie/inflatestream.nim 5,233 5,233 ±0
pixie.nim 5,220 5,224 -4 (-0.1%)
pixie/fileformats/webp_vp8_tables.nim 3,881 3,881 ±0
pixie/fileformats/ppm.nim 3,729 3,713 +16 (+0.4%)
pixie/contexts.nim 3,050 3,054 -4 (-0.1%)
pixie/fileformats/qoi.nim 2,726 2,702 +24 (+0.9%)
pixie/internal.nim 754 754 ±0
pixie/rgb565.nim 385 385 ±0
pixie/fontformats/svgfont.nim 215 215 ±0
pixie/decodebudget.nim 50 50 ±0

Wi-Fi stack — 295,296

Part This PR v2026.10.15 Δ
libnet80211.a 136,164 136,168 -4 (-0.0%)
libpp.a 62,154 62,154 ±0
libwpa_supplicant.a 54,900 54,904 -4 (-0.0%)
libphy.a 34,176 34,176 ±0
libesp_wifi.a 4,780 4,780 ±0
libesp_phy.a 2,541 2,541 ±0
libesp_coex.a 291 291 ±0
libcore.a 287 287 ±0
libespnow.a 3 3 ±0

Nim stdlib — 251,547

Part This PR v2026.10.15 Δ
pure/collections/tables.nim 72,312 72,312 ±0
system.nim 48,509 48,457 +52 (+0.1%)
pure/unicode.nim 17,405 17,405 ±0
pure/times.nim 16,884 16,888 -4 (-0.0%)
pure/json.nim 13,722 13,722 ±0
std/private/dragonbox.nim 10,351 10,351 ±0
pure/strutils.nim 8,043 8,047 -4 (-0.0%)
pure/parsexml.nim 6,003 6,011 -8 (-0.1%)
pure/algorithm.nim 5,372 5,372 ±0
pure/base64.nim 5,290 5,290 ±0
pure/hashes.nim 4,181 4,181 ±0
pure/xmlparser.nim 3,555 3,555 ±0
pure/parsejson.nim 3,553 3,553 ±0
std/formatfloat.nim 3,500 3,504 -4 (-0.1%)
pure/uri.nim 3,225 3,225 ±0
pure/streams.nim 2,820 2,820 ±0
pure/strformat.nim 2,546 2,546 ±0
std/syncio.nim 2,339 2,355 -16 (-0.7%)
pure/collections/sets.nim 2,075 2,075 ±0
pure/xmltree.nim 2,047 2,047 ±0
pure/lexbase.nim 1,801 1,801 ±0
pure/parseutils.nim 1,750 1,750 ±0
system/exceptions.nim 1,598 1,598 ±0
pure/strtabs.nim 1,572 1,572 ±0
pure/pathnorm.nim 1,336 1,336 ±0
pure/options.nim 1,016 1,016 ±0
std/private/ospaths2.nim 994 994 ±0
pure/collections/lists.nim 979 979 ±0
pure/math.nim 841 841 ±0
pure/collections/deques.nim 822 822 ±0
pure/random.nim 696 696 ±0
std/private/digitsutils.nim 651 651 ±0
std/oserrors.nim 633 633 ±0
std/private/osdirs.nim 572 572 ±0
system/dollars.nim 529 529 ±0
std/monotimes.nim 501 406 +95 (+23.4%)
std/private/oscommon.nim 329 329 ±0
std/envvars.nim 250 250 ±0
std/private/decode_helpers.nim 240 240 ±0
std/private/ossymlinks.nim 187 187 ±0
pure/bitops.nim 162 162 ±0
pure/os.nim 99 99 ±0
std/private/osfiles.nim 96 96 ±0
std/assertions.nim 87 87 ±0
core/macros.nim 65 65 ±0
system/ctypes.nim 9 9 ±0

FrameOS apps (Nim) — 190,404

Part This PR v2026.10.15 Δ
apps/data/icalJson 50,745 50,733 +12 (+0.0%)
apps/render/calendar 30,942 30,874 +68 (+0.2%)
apps/data/localImage 10,432 10,432 ±0
apps/render/split 9,736 9,772 -36 (-0.4%)
apps/data/eventsToAgenda 9,068 9,068 ±0
apps/render/zoomPan 8,600 8,648 -48 (-0.6%)
apps/apps.nim 7,255 7,247 +8 (+0.1%)
apps/render/text 5,447 5,455 -8 (-0.1%)
apps/data/xmlToJson 5,428 5,428 ±0
apps/render/svg 5,264 5,192 +72 (+1.4%)
apps/render/image 4,696 4,708 -12 (-0.3%)
apps/logic/setAsState 3,477 3,453 +24 (+0.7%)
apps/data/rotateImage 3,461 3,465 -4 (-0.1%)
apps/data/downloadImage 3,313 3,325 -12 (-0.4%)
apps/render/gradient 3,205 3,229 -24 (-0.7%)
apps/data/qr 3,118 3,122 -4 (-0.1%)
apps/data/downloadUrl 3,053 3,053 ±0
apps/render/color 2,836 2,824 +12 (+0.4%)
apps/data/newImage 2,668 2,668 ±0
apps/data/resizeImage 2,558 2,558 ±0
apps/render/opacity 2,312 2,296 +16 (+0.7%)
apps/data/log 2,299 2,299 ±0
apps/data/prettyJson 2,225 2,225 ±0
apps/data/clock 1,871 1,875 -4 (-0.2%)
apps/data/parseJson 1,848 1,856 -8 (-0.4%)
apps/logic/nextSleepDuration 1,663 1,663 ±0
apps/logic/ifElse 1,494 1,494 ±0
apps/logic/breakIfRendering 1,390 1,394 -4 (-0.3%)

ESP-IDF misc — 181,395

Part This PR v2026.10.15 Δ
libesp_hw_support.a 37,632 37,632 ±0
libhal.a 21,869 21,865 +4 (+0.0%)
libfreertos.a 17,240 17,240 ±0
libesp_system.a 13,736 13,780 -44 (-0.3%)
libesp_driver_uart.a 11,627 11,627 ±0
libheap.a 8,660 8,660 ±0
libesp_driver_i2c.a 8,062 8,062 ±0
libesp_driver_spi.a 7,756 7,756 ±0
libconsole.a 5,733 5,733 ±0
libjson.a 4,940 4,940 ±0
libesp_driver_gpio.a 3,890 3,878 +12 (+0.3%)
libbootloader_support.a 3,817 3,813 +4 (+0.1%)
libxtensa.a 3,691 3,691 ±0
libesp_driver_usb_serial_jtag.a 3,408 3,408 ±0
libesp_ringbuf.a 3,322 3,322 ±0
libesp_event.a 3,253 3,253 ±0
libesp_driver_ledc.a 3,054 3,054 ±0
libesp_mm.a 2,451 2,451 ±0
libapp_update.a 2,426 2,414 +12 (+0.5%)
libesp_timer.a 2,337 2,337 ±0
libesp_psram.a 2,172 2,329 -157 (-6.7%)
libsoc.a 2,316 2,316 ±0
libesp_adc.a 2,285 2,285 ±0
libpthread.a 1,397 1,397 ±0
liblog.a 1,375 1,375 ±0
libesp_security.a 1,050 1,050 ±0
libesp_rom.a 902 902 ±0
libesp_app_format.a 507 507 ±0
libxt_hal.a 437 437 ±0
libesp_common.a 26 26 ±0
libesp_pm.a 24 24 ±0

Embedded font — 146,362

Part This PR v2026.10.15 Δ
assets/fonts.nim 146,362 146,362 ±0

String pool (attributed to efuse) — 136,729

Part This PR v2026.10.15 Δ
esp_efuse_utility.c.obj 135,683 135,088 +595 (+0.4%)
esp_efuse_rtc_calib.c.obj 566 566 ±0
esp_efuse_table.c.obj 268 268 ±0
esp_efuse_api.c.obj 151 151 ±0
esp_efuse_startup.c.obj 61 61 ±0

fos_ firmware shell (C)* — 136,501

Part This PR v2026.10.15 Δ
fos_http.c.obj 22,185 22,185 ±0
fos_cloud.c.obj 19,651 19,258 +393 (+2.0%)
fos_console.c.obj 14,001 13,950 +51 (+0.4%)
fos_client.c.obj 12,957 12,266 +691 (+5.6%)
fos_settings.c.obj 7,722 7,618 +104 (+1.4%)
fos_scenes.c.obj 7,515 7,578 -63 (-0.8%)
fos_ota.c.obj 5,639 5,467 +172 (+3.1%)
fos_cloud_contract.c.obj 4,768 4,744 +24 (+0.5%)
fos_config.c.obj 4,619 4,619 ±0
fos_wifi.c.obj 3,189 3,189 ±0
fos_assets.c.obj 3,124 3,124 ±0
fos_sd_probe.c.obj 2,753 2,753 ±0
fos_buttons.c.obj 2,737 2,493 +244 (+9.8%)
fos_schedule.c.obj 2,614 2,602 +12 (+0.5%)
fos_assets_sd.c.obj 2,484 2,484 ±0
fos_events.c.obj 2,332 2,320 +12 (+0.5%)
fos_panel_draw.c.obj 2,229 — +2,229
fos_status_screen.c.obj 893 2,049 -1,156 (-56.4%)
main.c.obj 1,703 1,699 +4 (+0.2%)
fos_config_parse.c.obj 1,467 1,467 ±0
fos_url_guard.c.obj 1,397 1,397 ±0
fos_tz.c.obj 1,294 1,294 ±0
fos_buzzer.c.obj 1,162 901 +261 (+29.0%)
fos_battery.c.obj 1,140 1,140 ±0
fos_minisig.c.obj 1,140 1,140 ±0
fos_backend_http.c.obj 1,072 1,072 ±0
fos_commands.c.obj 940 940 ±0
fos_lan_access.c.obj 841 — +841
fos_scene_state.c.obj 650 650 ±0
fos_framebuffer.c.obj 483 483 ±0
fos_button_timing.c.obj 434 — +434
fos_board.c.obj 334 334 ±0
fos_assets_path.c.obj 259 259 ±0
fos_power.c.obj 241 241 ±0
fos_battery_filter.c.obj 214 214 ±0
fos_wake.c.obj 199 184 +15 (+8.2%)
fos_json_guard.c.obj 119 119 ±0

mbedTLS + certificates — 132,519

Part This PR v2026.10.15 Δ
libmbedcrypto.a 71,379 71,291 +88 (+0.1%)
libmbedtls.a 45,799 45,799 ±0
libmbedx509.a 7,084 7,092 -8 (-0.1%)
libesp-tls.a 6,705 6,705 ±0
libesp_https_server.a 1,552 1,552 ±0

lwIP / HTTP / WebSocket — 126,779

Part This PR v2026.10.15 Δ
liblwip.a 78,385 78,445 -60 (-0.1%)
libhttp_parser.a 10,350 10,350 ±0
libesp_http_server.a 10,020 10,020 ±0
libtcp_transport.a 8,241 8,245 -4 (-0.0%)
libespressif__esp_websocket_client.a 6,818 6,822 -4 (-0.1%)
libesp_http_client.a 6,666 6,666 ±0
libesp_netif.a 6,299 6,252 +47 (+0.8%)

libc / libm / newlib — 116,263

Part This PR v2026.10.15 Δ
libc.a 76,471 76,471 ±0
libm.a 31,563 31,563 ±0
libnewlib.a 6,609 6,609 ±0
libstdc++.a 1,476 1,476 ±0
libgcc.a 98 98 ±0
libcxx.a 46 46 ±0

Storage (SPIFFS / FatFS / SD / NVS) — 94,108

Part This PR v2026.10.15 Δ
libspiffs.a 20,380 20,380 ±0
libfatfs.a 20,133 20,133 ±0
libspi_flash.a 14,168 14,168 ±0
libnvs_flash.a 13,705 13,685 +20 (+0.1%)
libsdmmc.a 13,013 13,013 ±0
libvfs.a 6,196 6,196 ±0
libesp_driver_sdspi.a 3,866 3,866 ±0
libesp_partition.a 1,964 1,956 +8 (+0.4%)
libesp_vfs_console.a 678 678 ±0
libnvs_sec_provider.a 5 5 ±0

Nim packages (chrono, zippy, chroma, qrgen, ...) — 71,933

Part This PR v2026.10.15 Δ
QRgen 3.1.0 22,056 22,060 -4 (-0.0%)
chrono 0.3.1 15,658 15,586 +72 (+0.5%)
zippy 0.10.19 15,216 15,200 +16 (+0.1%)
chroma 1.0.0 14,714 14,714 ±0
checksums 0.2.1 3,371 3,371 ±0
flatty 0.3.4 533 533 ±0
jsony 1.1.5 272 272 ±0
bumpy 1.1.3 113 113 ±0

Display drivers (C) — 64,962

Part This PR v2026.10.15 Δ
(everything else) 21,278 21,282 -4 (-0.0%)
frameos_panel_table.c.obj 6,685 6,685 ±0
EPD_13in3e.c.obj 1,796 1,796 ±0
EPD_3in7.c.obj 1,564 1,564 ±0
EPD_5in79.c.obj 1,481 1,481 ±0
DEV_Debug.c.obj 1,313 1,317 -4 (-0.3%)
EPD_2in7.c.obj 1,292 1,292 ±0
EPD_4in2.c.obj 1,262 1,262 ±0
EPD_7in3e.c.obj 1,208 1,208 ±0
EPD_4in2_V2.c.obj 1,184 1,184 ±0
DEV_Config_esp.c.obj 1,180 1,180 ±0
EPD_4in26.c.obj 1,123 1,123 ±0
29 smaller rows 23,596 23,572 +24 (+0.1%)

Crypto (monocypher) — 35,141

Part This PR v2026.10.15 Δ
monocypher.c.obj 31,916 31,916 ±0
monocypher-ed25519.c.obj 3,225 3,225 ±0
Biggest movers (per object)
Object Δ This PR Baseline
frameos/input_state.nim +5,079 5,079 —
pkgs/QRgen-3.1.0/QRgen/renderer.nim -3,780 — 3,780
frameos/js_runtime/app_runtime.nim +2,216 74,851 72,635
frameos/utils/http_client.nim +1,815 11,805 9,990
frameos_nim_glue.c.obj +820 11,455 10,635
fos_client.c.obj +691 12,957 12,266
frameos/js_runtime/burrito.nim +603 8,097 7,494
esp_efuse_utility.c.obj +595 135,683 135,088
fos_cloud.c.obj +393 19,651 19,258
frameos/interpreter.nim -284 99,980 100,264
fos_ota.c.obj +172 5,639 5,467
fos_settings.c.obj +104 7,722 7,618
pkgs/chrono-0.3.1/chrono.nim +72 15,658 15,586
apps/render/calendar/app_loader.nim +68 7,125 7,057
fos_scenes.c.obj -63 7,515 7,578
Largest 30 objects
Object Subsystem This PR v2026.10.15 Δ
quickjs.c.obj QuickJS 287,826 287,846 -20 (-0.0%)
assets/fonts.nim Embedded font 146,362 146,362 ±0
esp_efuse_utility.c.obj String pool (attributed to efuse) 135,683 135,088 +595 (+0.4%)
frameos/interpreter.nim FrameOS core (Nim) 99,980 100,264 -284 (-0.3%)
frameos/js_runtime/app_runtime.nim FrameOS core (Nim) 74,851 72,635 +2,216 (+3.1%)
nim/lib/pure/collections/tables.nim Nim stdlib 72,312 72,312 ±0
pkgs/pixie-6.1.0/pixie/fontformats/opentype.nim pixie 55,460 55,460 ±0
libunicode.c.obj QuickJS 50,178 50,178 ±0
nim/lib/system.nim Nim stdlib 48,509 48,457 +52 (+0.1%)
apps/data/icalJson/ical.nim FrameOS apps (Nim) 45,028 45,016 +12 (+0.0%)
pkgs/pixie-6.1.0/pixie/fileformats/webp.nim pixie 37,493 37,493 ±0
pkgs/pixie-6.1.0/pixie/fileformats/svg.nim pixie 36,975 36,983 -8 (-0.0%)
frameos/utils/image.nim FrameOS core (Nim) 35,946 35,942 +4 (+0.0%)
pkgs/pixie-6.1.0/pixie/paths.nim pixie 32,895 32,875 +20 (+0.1%)
monocypher.c.obj Crypto (monocypher) 31,916 31,916 ±0
frameos/js_runtime/runtime.nim FrameOS core (Nim) 31,662 31,686 -24 (-0.1%)
pkgs/pixie-6.1.0/pixie/fileformats/jpeg.nim pixie 29,424 29,436 -12 (-0.0%)
apps/render/calendar/app.nim FrameOS apps (Nim) 23,817 23,817 ±0
fos_http.c.obj fos_* firmware shell (C) 22,185 22,185 ±0
pkgs/pixie-6.1.0/pixie/fileformats/png.nim pixie 22,097 22,101 -4 (-0.0%)
fos_cloud.c.obj fos_* firmware shell (C) 19,651 19,258 +393 (+2.0%)
embedded_main.nim FrameOS core (Nim) 19,252 19,252 ±0
frameos/utils/status_screen.nim FrameOS core (Nim) 17,947 17,943 +4 (+0.0%)
x509_crt_bundle.S.obj mbedTLS + certificates 17,928 17,928 ±0
embedded_runtime.nim FrameOS core (Nim) 17,830 17,834 -4 (-0.0%)
nim/lib/pure/unicode.nim Nim stdlib 17,405 17,405 ±0
frameos/utils/asset_colors.nim FrameOS core (Nim) 17,333 17,333 ±0
nim/lib/pure/times.nim Nim stdlib 16,884 16,888 -4 (-0.0%)
lib/tz.nim FrameOS core (Nim) 16,722 16,722 ±0
pkgs/pixie-6.1.0/pixie/images.nim pixie 15,771 15,779 -8 (-0.1%)

Flash = .text + .rodata from the linker map via esp_idf_size; "Inside each subsystem" splits every bucket one level down (the Nim core by directory, apps by app, packages by package, ESP-IDF by archive) over all objects, not just the largest. "String pool (attributed to efuse)" is the linker's merged string-literal pool for the whole image, not efuse code — see docs/esp32-image-size.md.

@mariusandra
mariusandra merged commit af94e40 into main Oct 18, 2026
22 checks passed
@mariusandra
mariusandra deleted the ci-nimcache-snapshots branch October 18, 2026 12:08
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@mariusandra