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Merge pull request #24 from sstangl/patch-1

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Correctly capitalize Firefox in the README
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Jef
2019-09-11 11:03:02 +02:00
committed by GitHub
parent e7f67b1725 b9836d4d9c
commit 31a75a2a84
1 changed files with 4 additions and 4 deletions
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README.md
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@@ -6,7 +6,7 @@ Lightbeam is an optimising one-pass streaming compiler for WebAssembly, intended
## Quality of output ## Quality of output
Already - with a very small number of relatively simple optimisation rules - Lightbeam produces surprisingly high-quality output considering how restricted it is. It even produces better code than Cranelift, FireFox or both for some workloads. Here's a very simple example, this recursive fibonacci function in Rust: Already - with a very small number of relatively simple optimisation rules - Lightbeam produces surprisingly high-quality output considering how restricted it is. It even produces better code than Cranelift, Firefox or both for some workloads. Here's a very simple example, this recursive fibonacci function in Rust:
```rust ```rust
fn fib(n: i32) -> i32 { fn fib(n: i32) -> i32 {
@@ -51,7 +51,7 @@ When compiled with optimisations enabled, rustc will produce the following WebAs
(get_local $l1))) (get_local $l1)))
``` ```
FireFox's optimising compiler produces the following assembly (labels cleaned up somewhat): Firefox's optimising compiler produces the following assembly (labels cleaned up somewhat):
```asm ```asm
fib: fib:
@@ -127,7 +127,7 @@ fib:
ret ret
``` ```
Whereas Lightbeam produces smaller code with far fewer memory accesses than both (and fewer blocks than FireFox's output): Whereas Lightbeam produces smaller code with far fewer memory accesses than both (and fewer blocks than Firefox's output):
```asm ```asm
fib: fib:
@@ -154,7 +154,7 @@ fib:
ret ret
``` ```
Now obviously I'm not advocating for replacing FireFox's optimising compiler with Lightbeam since the latter can only really produce better code when receiving optimised WebAssembly (and so debug-mode or hand-written WebAssembly may produce much worse output). However, this shows that even with the restrictions of a streaming compiler it's absolutely possible to produce high-quality assembly output. For the assembly above, the Lightbeam output runs within 15% of native speed. This is paramount for one of Lightbeam's intended usecases for real-time systems that want good runtime performance but cannot tolerate compiler bombs. Now obviously I'm not advocating for replacing Firefox's optimising compiler with Lightbeam since the latter can only really produce better code when receiving optimised WebAssembly (and so debug-mode or hand-written WebAssembly may produce much worse output). However, this shows that even with the restrictions of a streaming compiler it's absolutely possible to produce high-quality assembly output. For the assembly above, the Lightbeam output runs within 15% of native speed. This is paramount for one of Lightbeam's intended usecases for real-time systems that want good runtime performance but cannot tolerate compiler bombs.
## Specification compliance ## Specification compliance