This builds and publishes `ghostty-vt.wasm` binaries into our tip GitHub
releases. These are built with the proper optimization, `simd128` CPU
feature set, and run through `wasm-opt`.
This allows wasm consumers to use libghostty without a Zig toolkit.
Published two: `ghostty-vt.wasm` and `ghostty-vt-small.wasm`. The latter
is ReleaseSmall, but is 10 to 20% slower. Users choice.
This builds and publishes `ghostty-vt.wasm` binaries into our tip
GitHub releases. These are built with the proper optimization, `simd128`
CPU feature set, and run through `wasm-opt`.
This allows wasm consumers to use libghostty without a Zig toolkit.
Published two: `ghostty-vt.wasm` and `ghostty-vt-small.wasm`. The latter
is ReleaseSmall, but is 10 to 20% slower. Users choice.
This makes `ghostty_terminal_vt_write` on wasm32-freestanding anywhere
from 1.4x to 13x faster depending on the input, measured in V8 via Node
for Chrome as well as `jsc` for Safari.
This changes the default Wasm build to default to enabling the `simd128`
CPU feature because baseline doesn't have that and every major browser
has supported it for years. This results in massive performance
improvements (like, 50%+ on all streams).
Non-wasm performance is not impacted, all benchmarks were run on my mac
too w/ no regressions.
## Changes
* stream: the batched parse path (bulk UTF-8 decode, print_slice runs)
is used even when `build_options.simd` is false. The per-byte loop is
now debug-only.
* simd/vt: the scalar `utf8DecodeUntilControlSeq` gets a vectorized
ASCII bulk path that is compatible with wasm simd128.
* style: on wasm, `Style.eql` compares canonical `PackedStyle` forms
which is faster by like 11%. On native its slower so we only do this for
wasm.
* build: wasm targets now default to the `simd128` CPU feature since
every browser engine has supported it for years. Opt out with
`-Dcpu=generic`.
* PACKAGING.md documents the wasm build, including `wasm-opt` notes.
## Benchmarks
| Workload | Before | After | Speedup |
|---|---|---|---|
| ascii | 85 MB/s | 1070 MB/s | 12.5x |
| ascii-wrap | 84 MB/s | 1103 MB/s | 13.1x |
| clear-redraw | 85 MB/s | 913 MB/s | 10.7x |
| scroll | 79 MB/s | 304 MB/s | 3.8x |
| cursor | 120 MB/s | 255 MB/s | 2.1x |
| utf8 | 99 MB/s | 169 MB/s | 1.7x |
| sgr16 | 81 MB/s | 133 MB/s | 1.6x |
| sgr-truecolor | 62 MB/s | 88 MB/s | 1.4x |
End result: wasm at roughly 50-85% of the native ReleaseFast+SIMD build
on the same workloads. Plain ASCII was at 6% of native before.
**AI usage:** Lots of Fable help. As always, the human language stuff
like this commit and comments were rewritten by me.
This makes `ghostty_terminal_vt_write` on wasm32-freestanding anywhere
from 1.4x to 13x faster depending on the input, measured in V8 via Node
for Chrome as well as `jsc` for Safari.
## Changes
* stream: the batched parse path (bulk UTF-8 decode, print_slice runs)
is used even when `build_options.simd` is false. The per-byte loop
is now debug-only.
* simd/vt: the scalar `utf8DecodeUntilControlSeq` gets a vectorized
ASCII bulk path that is compatible with wasm simd128.
* style: on wasm, `Style.eql` compares canonical `PackedStyle` forms
which is faster by like 11%. On native its slower so we only do this
for wasm.
* build: wasm targets now default to the `simd128` CPU feature since
every browser engine has supported it for years. Opt out with
`-Dcpu=generic`.
* PACKAGING.md documents the wasm build, including `wasm-opt` notes.
## Benchmarks
| Workload | Before | After | Speedup |
|---|---|---|---|
| ascii | 85 MB/s | 1070 MB/s | 12.5x |
| ascii-wrap | 84 MB/s | 1103 MB/s | 13.1x |
| clear-redraw | 85 MB/s | 913 MB/s | 10.7x |
| scroll | 79 MB/s | 304 MB/s | 3.8x |
| cursor | 120 MB/s | 255 MB/s | 2.1x |
| utf8 | 99 MB/s | 169 MB/s | 1.7x |
| sgr16 | 81 MB/s | 133 MB/s | 1.6x |
| sgr-truecolor | 62 MB/s | 88 MB/s | 1.4x |
End result: wasm at roughly 50-85% of the native ReleaseFast+SIMD build
on the same workloads. Plain ASCII was at 6% of native before.
**AI usage:** Lots of Fable help. As always, the human language stuff
like this commit and comments were rewritten by me.
The "Reset" menu item and the "Reset Terminal" command palette entry
were translated as "Reiniciar", which reads as restarting the terminal
session or process. These actions perform a VT reset that clears
terminal state without restarting the shell, so "Redefinir" conveys
the correct meaning and matches the standard pt_BR terminology used
by other terminal emulators.
This improves the performance of render state plus C API reads. I
specifically benchmarked the C API call and found a lot of overhead in
the C API layer which this cleans up. The impact of these changes will
be less visible to Zig consumers but moderately improve there.
All benchmark numbers below are via the C API.
Highlights:
- full rebuilds are **1.71x faster (11.4µs to 6.6µs per 120x80 frame)**
- single-dirty-row updates (e.g. the TUI/prompt steady state) are
**1.44x faster**
- full-frame reads through the C API are **1.2x to 1.8x faster**
## Changes
* endUpdate skips unchanged style runs.
* `GRAPHEMES_UTF8` getter gets a fast path for single ASCII codepoints
(the overwhelming majority of cells).
* The bg/fg color getters no longer copy the full 28-byte style.
Instead, they switch directly on the one color field they need.
* The `get_multi` variants validate the handle and position once per
batch instead of per key.
* Iterator positions are sentinel values instead of Zig optionals. The
optional tagging overhead was showing up in benchmarks.
* `colors_get` reads through a pointer instead of copying the ~1KB
colors struct to the stack per call.
* The palette conversion is vectorized. The 4-byte padded RGB to 3-byte
was not being auto-vectorized. Explicitly vectorize it. Something like a
4x speedup on NEON.
## Benchmarks
| Benchmark | Before | After | Speedup |
|---|---|---|---|
| update (forced full rebuild) | 11.4 µs/frame | 6.6 µs/frame | 1.71x |
| update (single dirty row) | 143 ns | 99 ns | 1.44x |
| read cell style/bg/fg/selected | 10.3 ns/cell | 8.8 ns/cell | 1.17x |
| read cell via get_multi | 9.6 ns/cell | 6.9 ns/cell | 1.40x |
|read cell UTF-8 text | 4.9 ns/cell | 2.7 ns/cell | 1.78x |
| colors_get + palette | 213 ns/call | 45 ns/call | 4.58x |
Clean updates (no terminal changes) and the raw cell read paths are
unchanged.
**AI usage:** Driven by Fable primarily, reviewed everything and rewrote
all human-language (comments) since Fable in particular does really bad
at that. This commit message too.
This improves the performance of render state plus C API reads. I
specifically benchmarked the C API call and found a lot of overhead in
the C API layer which this cleans up. The impact of these changes will be
less visible to Zig consumers but moderately improve there.
All benchmark numbers below are via the C API.
Highlights:
- full rebuilds are **1.71x faster (11.4µs to 6.6µs per 120x80 frame)**
- single-dirty-row updates (e.g. the TUI/prompt steady state) are *1.44x
faster**
- full-frame reads through the C API are **1.2x to 1.8x faster**
## Changes
* endUpdate skips unchanged style runs.
* `GRAPHEMES_UTF8` getter gets a fast path for single ASCII codepoints (the
overwhelming majority of cells).
* The bg/fg color getters no longer copy the full 28-byte style. Instead,
they switch directly on the one color field they need.
* The `get_multi` variants validate the handle and position once per batch
instead of per key.
* Iterator positions are sentinel values instead of Zig optionals. The
optional tagging overhead was showing up in benchmarks.
* `colors_get` reads through a pointer instead of copying the ~1KB colors
struct to the stack per call.
* The palette conversion is vectorized. The 4-byte padded RGB to 3-byte
was not being auto-vectorized. Explicitly vectorize it. Something like
a 4x speedup on NEON.
## Benchmarks
| Benchmark | Before | After | Speedup |
|---|---|---|---|
| update (forced full rebuild) | 11.4 µs/frame | 6.6 µs/frame | 1.71x |
| update (single dirty row) | 143 ns | 99 ns | 1.44x |
| read cell style/bg/fg/selected | 10.3 ns/cell | 8.8 ns/cell | 1.17x |
| read cell via get_multi | 9.6 ns/cell | 6.9 ns/cell | 1.40x |
| read cell UTF-8 text | 4.9 ns/cell | 2.7 ns/cell | 1.78x |
| colors_get + palette | 213 ns/call | 45 ns/call | 4.58x |
Clean updates (no terminal changes) and the raw cell read paths
are unchanged.
**AI usage:** Driven by Fable primarily, reviewed everything and rewrote
all human-language (comments) since Fable in particular does really bad
at that. This commit message too.
Cell contents used our ArrayListCollection container to manage per-row
foreground lists. This was the only place ArrayListCollection was used.
We now own the row list slice directly, initialize cursor capacity to
exactly one cell, and reallocate the contiguous background buffer in
place when possible. Foreground rows still use exact sizes so resizes
(which are infrequent) do not retain the high-water mark.
Previously, insertText commits without marked text were delivered via
sendText, which applies paste semantics and wraps the text in bracketed
paste when the program enables it. macOS dictation and other input
methods often commit without marked text, so programs treated dictated
text as a paste and applied paste-specific handling.
insertText is only invoked by input methods (IME, dictation, emoji
picker, character viewer); real paste operations use a separate path.
Send every non-empty commit through the key event path so programs
interpret input method text as typed input. Typing is unaffected (the
accumulator path returns earlier) and Cmd+V pastes are unaffected.
The helper is renamed from committedPreeditTextAction to
committedTextAction since it no longer only handles preedit commits.
Cell contents used our ArrayListCollection container to manage per-row
foreground lists. This was the only place ArrayListCollection was used.
We now own the row list slice directly, initialize cursor capacity to
exactly one cell, and reallocate the contiguous background buffer in
place when possible. Foreground rows still use exact sizes so resizes
(which are infrequent) do not retain the high-water mark.
We shouldn't hold a closing surface view when sending notifications and
waiting to dismiss that notification. This happens rarely, but it's the
right thing to do.
### AI Disclosure
Found by Claude when judging other branches, I applied the changes
myself.
> Forgot that after force pushing, you can't reopen#13787 , linking it
here for the review history.
This PR also updates old translations to keep better consistency.
AI Disclaimer: I translated manually all strings and then used an agent
to review consistency and legibility and applied many suggestions.
Minor things as I was just auditing the state of our headers:
* Make sure all subheaders like `point.h` can be included standalone
* Support Clang/GCC extensions for typed enums if we can detect it
* Add missing structs to the `ghostty_type_json` function
* Fix `GHOSTTY_INIT_SIZED` for C++ mode
Use an immediately invoked lambda for GHOSTTY_INIT_SIZED in C++ so the
macro value-initializes every field before setting the ABI size. The
previous C compound literal and designated initializer required compiler
extensions in C++17 and C++20.
Keep the existing standard compound literal for C callers.
Use fixed int enum types for C++11, C23, Clang's fixed-enum extension,
and GCC 13 or newer. Previously only finalized C23 mode selected an explicit
underlying type, leaving C++ and common older C modes with
implementation-defined enum types.
Dynamic tabstop storage treated the number of columns above the inline
capacity as a byte count even though each byte stores eight stops. This
was wasteful, although in practice this is in the order of just bytes.
Round the extra column count up to whole storage units and grow the
existing slice with realloc, preserve existing stops.
This prevents us from pulling in test images that trigger some anti-virus
scanners. It's also smaller since it only has the necessary bits that we need.
This also updates to the latest release: 0.4.0-alpha.10.
