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Memory: interface fonts are read once and shared with egui, not copied into it

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egui copies an owned font's bytes into its text engine (epaint's
blob_from_font_data clones the Cow) and keeps the original FontData too,
so every interface and script fallback font was in memory twice: about
100 MB on a Mac, where the fallbacks alone (Hiragino Sans GB, Hiragino
Sans, Apple SD Gothic Neo, Thonburi...) are 89 MB of files. try_load now
keeps each file it reads for the rest of the run and hands egui borrowed
'static bytes, which it shares. These faces are loaded by every font
rebuild anyway, so keeping them costs nothing, and rebuilds no longer
read them from disk again. A missing or broken file is looked for again
next time. Which faces load, and their order, are unchanged; workbook
fonts (bind_faces) load as before.

Measured on macOS 27 (Apple M3 Max), offscreen snapshot held after its
picture, settled footprint: empty workbook 258 -> 158 MB, the sample
workbook 261 -> 160 MB, a cell in five scripts 258 -> 158 MB; the
rendered pictures are byte-for-byte the same.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Bryan Mark
2026-10-16 14:26:53 +09:00
co-authored by Claude Opus 5.5
parent bb685e3275
commit c5baa829e3
2 changed files with 48 additions and 7 deletions
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ROADMAP.md
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@@ -2,7 +2,7 @@
**Stage: alpha** · next: beta, ~25 points of "ready for real work" and ~160–240 h away
> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-12 · **Change:** minor (rows auto-fit oversized fonts on open and whole-row/column formatting) · **Target:** Microsoft Excel (Microsoft 365)
> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-16 · **Change:** minor (interface fonts held once instead of twice) · **Target:** Microsoft Excel (Microsoft 365)
GridCraft aims at full Microsoft Excel parity, and at being better in places: faster, open (XLSX
is the native format), fully scriptable by agents (MCP, control channel, CLI), and on the web.
@@ -132,6 +132,7 @@ Ranked; estimates in Opus 5.5 agent-hours. Detail and the full beta-gate list in
| Date | What landed |
|---|---|
| 2026-10-16 | Memory: the interface and script fallback fonts are read once per run and shared with egui instead of copied into it: an empty workbook settles at 158 MB instead of 258 MB on macOS |
| 2026-10-12 | Rows auto-fit oversized fonts: opening a file and whole-row/column formatting grow non-custom rows to their tallest font (#833) |
| 2026-10-12 | Number formats: parsing a format code is linear in its length (long runs of `[`, `,` or `/` no longer take quadratic time), and an unclosed `[` is a literal when splitting sections as well as when tokenizing (#810) |
| 2026-10-12 | Number formats: a fraction denominator with 65,536 zeros no longer crashes; format codes are capped at 255 characters like Excel (longer codes display as General, `TEXT` gives `#VALUE!`) (#807) |
@@ -193,6 +194,7 @@ Ranked; estimates in Opus 5.5 agent-hours. Detail and the full beta-gate list in
| Date | Change | Summary |
|---|---|---|
| 2026-10-16 | minor | Progress log: interface fonts held once instead of twice |
| 2026-10-12 | minor | Rows auto-fit oversized fonts on open and whole-row/column formatting (#833); progress log row |
| 2026-10-12 | minor | Progress log: multi-area row/column delete (#758) |
| 2026-10-12 | trivial | Progress log: XLSX chart sheets kept on save (#727) |