c2a61a4192
Bumped versions for 1.33.2 Please ensure: - [x] Target branch is correct (`vX.XX` if a patch release, `main` if minor) - [x] Crate versions are bumped correctly - [x] deno_std version is incremented in the code (see `cli/deno_std.rs`) - [ ] Releases.md is updated correctly (think relevancy and remove reverts) To make edits to this PR: ```shell git fetch upstream release_1_33.2 && git checkout -b release_1_33.2 upstream/release_1_33.2 ``` cc @levex --------- Co-authored-by: levex <levex@users.noreply.github.com> Co-authored-by: Levente Kurusa <lkurusa@kernelstuff.org> |
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| .. | ||
| 00_ffi.js | ||
| call.rs | ||
| callback.rs | ||
| Cargo.toml | ||
| dlfcn.rs | ||
| ir.rs | ||
| lib.rs | ||
| README.md | ||
| repr.rs | ||
| static.rs | ||
| symbol.rs | ||
| turbocall.rs | ||
deno_ffi
This crate implements dynamic library ffi.
Performance
Deno FFI calls have extremely low overhead (~1ns on M1 16GB RAM) and perform on par with native code. Deno leverages V8 fast api calls and JIT compiled bindings to achieve these high speeds.
Deno.dlopen generates an optimized and a fallback path. Optimized paths are
triggered when V8 decides to optimize the function, hence call through the Fast
API. Fallback paths handle types like function callbacks and implement proper
error handling for unexpected types, that is not supported in Fast calls.
Optimized calls enter a JIT compiled function "trampoline" that translates Fast
API values directly for symbol calls. JIT compilation itself is super fast,
thanks to tinycc. Currently, the optimized path is only supported on Linux and
MacOS.
To run benchmarks:
target/release/deno bench --allow-ffi --allow-read --unstable ./test_ffi/tests/bench.js