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denoland-deno/ext/ffi
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Asher Gomez 9e8f84214f
refactor: cleanup unstable checks for WebGPU, FFI and FS APIs (#25586) 
Continuation of work in #25488.

---------

Signed-off-by: Asher Gomez <ashersaupingomez@gmail.com>
2024-09-12 12:27:16 +00:00
..
00_ffi.js fix(runtime): use more null proto objects again (#25040) 2024-09-06 12:52:59 +02:00
call.rs refactor: cleanup unstable checks for WebGPU, FFI and FS APIs (#25586) 2024-09-12 12:27:16 +00:00
callback.rs refactor: cleanup unstable checks for WebGPU, FFI and FS APIs (#25586) 2024-09-12 12:27:16 +00:00
Cargo.toml chore: forward v1.46.3 release commit to main (#25425) 2024-09-04 17:16:24 +00:00
dlfcn.rs refactor: cleanup unstable checks for WebGPU, FFI and FS APIs (#25586) 2024-09-12 12:27:16 +00:00
ir.rs chore: upgrade to rust 1.79 (#24207) 2024-06-14 17:10:57 +05:30
lib.rs refactor: cleanup unstable checks for WebGPU, FFI and FS APIs (#25586) 2024-09-12 12:27:16 +00:00
README.md chore: move test_ffi and test_nap to tests/ [WIP] (#22394) 2024-02-12 13:46:50 -07:00
repr.rs refactor: cleanup unstable checks for WebGPU, FFI and FS APIs (#25586) 2024-09-12 12:27:16 +00:00
static.rs BREAKING(ffi/unstable): always return u64 as bigint (#23981) 2024-05-28 09:31:09 +05:30
symbol.rs BREAKING(unstable/ffi): remove callback reentrant flag (#24367) 2024-07-01 09:36:33 +05:30
turbocall.rs feat: upgrade deno_core (#25042) 2024-08-19 14:51:16 +00:00

README.md

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-ffi ./tests/ffi/tests/bench.js