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72 lines
2.3 KiB
Markdown
72 lines
2.3 KiB
Markdown
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# Faster rebuilds with [`cargo-plonk`](https://crates.io/crates/cargo-plonk)
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This document describes how to use `cargo plonk` to speed up Deno rebuilds for
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faster dev cycles.
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```
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cargo install cargo-plonk
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```
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## How it works
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Plonk works by hot swapping symbols using a fresh dynamic library of the local
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crates.
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## Usage
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First, compile Deno normally.
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```
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cargo build -p deno [--release]
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```
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Run the following command to start watching for changes in `ext/webgpu` crate
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and hot swap `init_ops_and_esm` function into the previously built `deno` bin.
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```
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cargo plonk run \
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--package deno_webgpu \
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--symbol init_ops_and_esm \
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--bin deno \
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--watch
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```
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> Important:
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>
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> Currently, this will only works for symbols that have been "materialized" in
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> their crates. Cross-crate generics will not work.
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You can use `cargo plonk run` to re-run commands on changes.
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```
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cargo plonk run -v \
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-p deno_webgpu \
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-s init_ops_and_esm \
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-b deno \
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--watch \
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-- eval "await navigator.gpu.requestAdapter()" --unstable
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```
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Comparing incremental compile times for `ext/webgpu` on Mac M1:
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| profile | `cargo build` | `cargo plonk build` |
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| --------- | ------------- | ------------------- |
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| `debug` | 42 s | 0.5s |
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| `release` | 5 mins 12 s | 2s |
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## Debugging
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Use the `-v`/`--verbose` flag to turn on debug info.
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```
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Finished dev [unoptimized + debuginfo] target(s) in 8.86s
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[*] Running: DYLD_INSERT_LIBRARIES="/Users/divy/gh/plonk/target/release/build/cargo-plonk-dd0f08c90ca82109/out/inject.dylib" DYLD_LIBRARY_PATH="/Users/divy/.rustup/toolchains/1.75.0-aarch64-apple-darwin/lib" NEW_SYMBOL="_ZN11deno_webgpu11deno_webgpu16init_ops_and_esm17h683ed96f45027bc1E" PLONK_BINARY="/Users/divy/gh/deno/target/debug/deno" PLONK_LIBRARY="/Users/divy/gh/deno/target/debug/libdeno_webgpu.dylib" SYMBOL="_ZN11deno_webgpu11deno_webgpu16init_ops_and_esm17h6907fcd8be7e215eE" VERBOSE="y" "/Users/divy/gh/deno/target/debug/deno" "eval" "await navigator.gpu.requestAdapter()" "--unstable"
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[*] Plonking _ZN11deno_webgpu11deno_webgpu16init_ops_and_esm17h6907fcd8be7e215eE in /Users/divy/gh/deno/target/debug/libdeno_webgpu.dylib
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[*] Old address: 0x105fcff2c
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[*] New address: 0x128511424
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===
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```
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Report any bugs and feature requests in the `cargo-plonk` issue tracker:
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https://github.com/littledivy/plonk/issues/new
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