zed/crates/agent/Cargo.toml
Anthony Eid cbaf8e4d9d
Speed up StreamingDiff::push_new part two (#57849)
Follow-up to #57772.

While comparing the `edit_file_tool_streaming/medium_insertions`
benchmark in Criterion and xctrace, I noticed the DP scoring loop was
spending most of its time on inlined `Matrix::get`/`Matrix::set` access
in `StreamingDiff::push_new`.

This changes the loop to split the previous and current score columns
once per DP column and then index those column slices directly. This
keeps the scoring algorithm the same, but hoists the column offset
calculation out of the inner loop and gives the compiler clearer
aliasing information between the immutable previous column and mutable
current column.

In xctrace, the hottest DP scoring line dropped from 10,407 samples
before to 9,409 samples after on
`edit_file_tool_streaming/medium_insertions`, and total
`StreamingDiff::push_new` leaf samples dropped from 10,800 to 9,822.

This is consistently faster in the end-to-end `edit_file_tool`
benchmark, and gives a small speed-up for the targeted workload without
changing the scoring algorithm.

### Results

Benchmarked with `release-fast` against a clean baseline using
Criterion’s `before_slice` baseline.

#### `streaming_diff_push_new`

| Fixture | Before median | After median | Change |
| --- | ---: | ---: | ---: |
| `tiny_function_rewrite` | `7.6317 ms` | `6.4951 ms` | 10.8% faster |
| `small_function_rewrite` | `45.961 ms` | `44.839 ms` | No significant
change |
| `medium_many_small_changes` | `99.694 ms` | `104.83 ms` | 5.2% slower
|
| `medium_insertions` | `95.909 ms` | `83.093 ms` | 13.5% faster |

#### `edit_file_tool_streaming`

| Fixture | Before median | After median | Change |
| --- | ---: | ---: | ---: |
| `tiny_function_rewrite` | `1.1110 ms` | `1.0617 ms` | 7.1% faster |
| `small_function_rewrite` | `2.4554 ms` | `2.2751 ms` | 7.1% faster |
| `medium_many_small_changes` | `87.272 ms` | `77.065 ms` | 11.5% faster
|
| `medium_insertions` | `92.469 ms` | `87.478 ms` | 5.9% faster |

The lower-level `streaming_diff_push_new` benchmark is mixed, but the
end-to-end `edit_file_tool_streaming` workload improves across all
fixtures.

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [x] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Release Notes:

- N/A or Added/Fixed/Improved ...
2026-05-27 19:33:04 +00:00

114 lines
3.1 KiB
TOML

[package]
name = "agent"
version = "0.1.0"
edition.workspace = true
publish.workspace = true
license = "GPL-3.0-or-later"
[lib]
path = "src/agent.rs"
[features]
test-support = ["db/test-support"]
unit-eval = []
e2e = []
[lints]
workspace = true
[dependencies]
acp_thread.workspace = true
action_log.workspace = true
async-channel.workspace = true
agent-client-protocol.workspace = true
agent_servers.workspace = true
agent_settings.workspace = true
agent_skills.workspace = true
anyhow.workspace = true
chrono.workspace = true
client.workspace = true
cloud_api_types.workspace = true
cloud_llm_client.workspace = true
collections.workspace = true
context_server.workspace = true
db.workspace = true
feature_flags.workspace = true
fs.workspace = true
futures.workspace = true
git.workspace = true
gpui.workspace = true
handlebars = { workspace = true, features = ["rust-embed"] }
heck.workspace = true
html_to_markdown.workspace = true
http_client.workspace = true
indoc.workspace = true
itertools.workspace = true
language.workspace = true
language_model.workspace = true
language_models.workspace = true
log.workspace = true
parking_lot.workspace = true
paths.workspace = true
project.workspace = true
prompt_store.workspace = true
quick-xml.workspace = true
regex.workspace = true
rust-embed.workspace = true
schemars.workspace = true
serde.workspace = true
serde_json.workspace = true
settings.workspace = true
shell_command_parser.workspace = true
smallvec.workspace = true
sqlez.workspace = true
streaming_diff.workspace = true
strsim.workspace = true
task.workspace = true
telemetry.workspace = true
text.workspace = true
thiserror.workspace = true
ui.workspace = true
url.workspace = true
util.workspace = true
uuid.workspace = true
watch.workspace = true
web_search.workspace = true
zed_env_vars.workspace = true
zstd.workspace = true
[dev-dependencies]
async-io.workspace = true
agent_servers = { workspace = true, "features" = ["test-support"] }
client = { workspace = true, "features" = ["test-support"] }
clock = { workspace = true, "features" = ["test-support"] }
context_server = { workspace = true, "features" = ["test-support"] }
criterion.workspace = true
ctor.workspace = true
db = { workspace = true, "features" = ["test-support"] }
editor = { workspace = true, "features" = ["test-support"] }
env_logger.workspace = true
eval_utils.workspace = true
fs = { workspace = true, "features" = ["test-support"] }
git = { workspace = true, "features" = ["test-support"] }
gpui = { workspace = true, "features" = ["test-support"] }
gpui_tokio.workspace = true
language = { workspace = true, "features" = ["test-support"] }
language_model = { workspace = true, "features" = ["test-support"] }
lsp = { workspace = true, "features" = ["test-support"] }
pretty_assertions.workspace = true
project = { workspace = true, "features" = ["test-support"] }
rand.workspace = true
reqwest_client.workspace = true
settings = { workspace = true, "features" = ["test-support"] }
tempfile.workspace = true
theme = { workspace = true, "features" = ["test-support"] }
unindent = { workspace = true }
zlog.workspace = true
[[bench]]
name = "edit_file_tool"
harness = false
required-features = ["test-support"]