310770 2026-03-25 22:33:27 -0700 utf8Buffer() in SharedBuffer.h allocates too much memory for 8-bit strings 2026-03-26 06:23:13 -0700 1 1 1 Unclassified WebKit WebCore Misc. WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 cdumez cdumez webkit-bug-importer oldest_to_newest 2193748 0 cdumez 2026-03-25 22:33:27 -0700 Latin1 characters (0x80-0xFF) encode as at most 2 UTF-8 bytes; ASCII (0x00-0x7F) as 1 byte. So length * 2 is sufficient for 8-bit strings. The 3x multiplier is only needed for 16-bit strings (a single BMP codepoint can be 3 UTF-8 bytes). Additionally, Vector<uint8_t> buffer(length * 3) zero-initializes the entire allocation, so the waste is both allocation and initialization. 2193749 1 cdumez 2026-03-25 22:35:17 -0700 Pull request: https://github.com/WebKit/WebKit/pull/61376 2193922 2 ews-feeder 2026-03-26 06:22:29 -0700 Committed 309984@main (65bc0fda9edd): <https://commits.webkit.org/309984@main> Reviewed commits have been landed. Closing PR #61376 and removing active labels. 2193923 3 webkit-bug-importer 2026-03-26 06:23:13 -0700 <rdar://problem/173402781>