Commit Graph

2 Commits

Author SHA1 Message Date
Jacob Trimble 18b59c5294 Disallow using new Uint8Array with BufferSource.
Using "new Uint8Array" with a TypedArray creates a copy of the buffer;
this is unnecessarily expensive for large buffers.  This adds a rule
to disallow using it in favor of a new utility that correctly creates
a new "view" on the same buffer.

Note it is fine to pass an ArrayBuffer to "new Uint8Array" and it won't
copy; but there there are many cases where the type is BufferSource,
so it could be a TypedArray.  Unfortunately, there are many other cases
where we explicitly pass an ArrayBuffer; but the compiler rules don't
allow us to whitelist this case (since ArrayBuffer is part of
BufferSource).

Change-Id: I58696a85a9cbcc188c0b16919c9eeb63e56edca1
2019-08-21 20:40:59 +00:00
Jacob Trimble a2bcf7278d Move some utilities to BufferUtils.
Change-Id: Ifb3c4348cc912640b99ff53f7cac59a63480c68e
2019-08-20 22:07:35 +00:00