- apprt-gtk: Ghostty's runtime+build-time version gating (at_least)
with cargo features adw_1_3/adw_1_4/adw_1_5/gtk_4_16 (default on) and
the fallbacks for older libraries: MessageDialog (adw < 1.5),
clipboard dialog without SwitchRow, pre-Banner debug warning and
child-exited widgets, the old about dialog, GTK 4.16 CSS error source
bytes. The minimum stays GTK 4.14 / libadwaita 1.5 (Ghostty's floor).
The root build links with -z lazy so version-gated symbols don't keep
older libraries from loading.
- ghostty-helpgen (port of helpgen.zig) generates CLI action help and
keybinding action docs from doc comments at build time, replacing the
checked-in help/*.txt; +help and +list-actions --docs stay
byte-identical to Ghostty 1.3.1.
- ghostty-bench: libc wcwidth mode and separate simd/table and
uucode/table code paths like Zig.
- ghostty-cli: Windows branches of edit-config, list-colors,
list-keybinds and boo; ssh-cache DiskCache flock locking (no-op on
Windows, as in Zig) with an exclusivity test.
Test Plan:
- cargo test --workspace
- diff <(cargo run -q -- +list-actions --docs) \
<(ghostty +list-actions --docs)
Adds crates/ghostty-bench, a port of ZIG/src/benchmark and src/synthetic:
the ghostty-bench binary (terminal-stream, terminal-parser,
codepoint-width, grapheme-break, is-symbol, osc-parser, screen-clone
with Zig's CLI) and ghostty-synthetic data generators (+ascii, +utf8,
+osc, plus a Rust-only +sgr mode).
Measured against Ghostty's own ghostty-bench built with Zig 0.15.2
(ReleaseFast) vs --profile production, the hot paths were optimized
without behaviour changes:
- Terminal::print single-lookup fast path for width-1 chars mid-line
- page grapheme allocator: bitmap first-fit instead of a linear scan
(was 38% of utf8 stream time; randomized equivalence test added)
- plain cells skip per-cell work in clear_cells and row cloning
- ASCII fast path + strict hand-written UTF-8 decoder (exhaustive
equivalence test against std)
- parser/OSC parser split into inlined fast and state-change paths
- RenderState allocates grapheme vectors only for grapheme rows
- Page::assert_integrity no-op stub so the production profile builds
terminal-stream is now at parity (ascii 1.08x, utf8 0.97x, SGR 1.04x of
Zig's time). Still slower: screen-clone (~2.6x, zero-filling fresh
cell Vecs vs Zig's lazily-zeroed mmap), osc-parser (1.9x), and the raw
parser on SGR data (1.5x). Full table in docs/rewrite/notes/perf-P1.md.
Test Plan:
- cargo test --workspace (no failures)
- cargo run --profile production -p ghostty-bench -- +terminal-stream
--data=<file> and compare with Zig's ghostty-bench
ddidderr