1561573 - Avoid linearization and inflation to UTF-16 of the string input to TextEncoder

Status: RESOLVED FIXED

(Core :: Internationalization, enhancement, P3)

Description

[Henri Sivonen (:hsivonen)]

To optimize string passing from JS to Wasm, avoid having the WebIDL layer linearize the input string and inflate it to UTF-16.

Comment 1

[Henri Sivonen (:hsivonen)]

Attachment: Bug 1561573 - Avoid linearization and inflation to UTF-16 of the string input to TextEncoder.

Comment 2

[Henri Sivonen (:hsivonen)]

Attachment: Bug 1561573 - Avoid linearization and inflation to UTF-16 of the string input to TextEncoder.

Comment 3

[Henri Sivonen (:hsivonen)]

Performance-wise this seems like a clear win. The performance depends on the input, of course. While I can construct input that regresses performance by low single-digit percentages, when ASCII rope segments are involved, the improvements go into good double-digit percentages and the perf over doubles in the best case.

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/c7d88625df86
Avoid linearization and inflation to UTF-16 of the string input to TextEncoder. r=jandem,bzbarsky

Comment 5

[Noemi Erli[:noemi_erli]]

https://hg.mozilla.org/mozilla-central/rev/c7d88625df86