cranelift

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Author	SHA1	Message	Date
Andrew Brown	4899537328	bench: add more WASI benchmarks (#5309 ) * bench: add more WASI benchmarks This follows up on #5274 to add several more scenarios with which to benchmark WASI performance: - `open-file.wat`: opens and closes a file - `read-file.wat`: opens a file, reads 4K bytes from it, then closes it - `read-dir.wat`: reads a directory's entries Each benchmark is hand-crafted WAT to more clearly control what WASI calls are made. As with #5274, these modules' sole entry point takes a parameter indicating the number of iterations to run in order to use `criterion`'s `iter_custom` feature. * fix: reduce expected size of directory entries	2 years ago
Andrew Brown	8426904129	bench: benchmark several common WASI scenarios (#5274 ) In order to properly understand the impact of providing thread-safe implmentations of WASI contexts (#5235), we need benchmarks that measure the current performance of WASI calls using Wiggle. This change adds several common WASI scenarios as WAT files (see `benches/wasi/*.wat`) and benchmarks them with `criterion`. Using `criterion`'s `iter_custom`, the WAT file runs the desired number of benchmark iterations internally and the total duration of the runs is divided to get the average time for each loop iteration. Why WAT? When compiling these benchmarks from Rust to `wasm32-wasi`, the output files are large, contain other WASI imports than the desired ones, and overall it is difficult to tell if we are measuring what we expect. By hand-writing the WAT, it is (slightly) more clear what each benchmark is doing.	2 years ago

Author

SHA1

Message

Date

Andrew Brown

4899537328

bench: add more WASI benchmarks (#5309 )

* bench: add more WASI benchmarks

This follows up on #5274 to add several more scenarios with which to
benchmark WASI performance:
- `open-file.wat`: opens and closes a file
- `read-file.wat`: opens a file, reads 4K bytes from it, then closes it
- `read-dir.wat`: reads a directory's entries

Each benchmark is hand-crafted WAT to more clearly control what WASI
calls are made. As with #5274, these modules' sole entry point takes a
parameter indicating the number of iterations to run in order to use
`criterion`'s `iter_custom` feature.

* fix: reduce expected size of directory entries

2 years ago

Andrew Brown

8426904129

bench: benchmark several common WASI scenarios (#5274 )

In order to properly understand the impact of providing thread-safe
implmentations of WASI contexts (#5235), we need benchmarks that measure
the current performance of WASI calls using Wiggle. This change adds
several common WASI scenarios as WAT files (see `benches/wasi/*.wat`)
and benchmarks them with `criterion`. Using `criterion`'s `iter_custom`,
the WAT file runs the desired number of benchmark iterations internally
and the total duration of the runs is divided to get the average time
for each loop iteration.

Why WAT? When compiling these benchmarks from Rust to `wasm32-wasi`, the
output files are large, contain other WASI imports than the desired
ones, and overall it is difficult to tell if we are measuring what we
expect. By hand-writing the WAT, it is (slightly) more clear what each
benchmark is doing.

2 years ago

2 Commits (8aec021480de0a1486efba8f6ae6c4c0aeaf8af2)