@sld0ant/pi-diff

High-performance diff patch for pi-agent with Patience algorithm and WASM acceleration.

Quick Install

bunx @sld0ant/pi-diff install

Uninstall

bunx @sld0ant/pi-diff uninstall

Check Status

bunx @sld0ant/pi-diff status

Features

• Patience algorithm for code — better structure preservation (functions, classes)
• Myers algorithm for data — faster for JSON, YAML, Markdown
• WASM acceleration — 5-8x faster on large files (>1000 lines)
• 80 KB — compact universal WASM bundle

How It Works

Auto Algorithm Selection

File Type	Algorithm	Reason
.ts, .js, .py, .rs, .go	Patience	Preserves code structure
.json, .yaml, .md, .txt	Myers	Faster for data
>10000 lines	Myers	Performance

Example Difference

Refactoring: moving a function

Myers shows:

-function hello() { ... }
+function world() { ... }

(thinks hello was replaced with world)

Patience shows:

+function world() { ... }
 
 function hello() { ... }

(understands world was added, hello stayed)

Performance

File Size	JS (diff)	WASM (@sld0ant/pi-diff)	Speedup
1000 lines	4ms	2.5ms	1.6x
5000 lines	119ms	21ms	5.6x
10000 lines	520ms	64ms	8.1x

Build from Source

Prerequisites

• Rust + cargo
• wasm-pack (cargo install wasm-pack)
• Bun

Build

bun install
bun run build

Local Install

bun run install-patch

After Updating pi-agent

When pi-agent is updated, the patch will be overwritten. Reinstall:

bunx @sld0ant/pi-diff install

License

MIT