4 commits

Author	SHA1	Message	Date
Timothy Flynn	00182a2405	LibJS: Port the JS lexer and parser to UTF-16 ... This ports the lexer to UTF-16 and deals with the immediate fallout up to the AST. The AST will be dealt with in upcoming commits. The lexer will still accept UTF-8 strings as input, and will transcode them to UTF-16 for lexing. This doesn't actually incur a new allocation, as we were already converting the input StringView to a ByteString for each lexer. One immediate logical benefit here is that we do not need to know off- hand how many UTF-8 bytes some special code points occupy. They all happen to be a single UTF-16 code unit. So instead of advancing the lexer by 3 positions in some cases, we can just always advance by 1.	2025-08-13 09:56:13 -04:00
Viktor Szépe	19f88f96dc	Everywhere: Fix typos - act III	2025-06-16 14:20:48 +01:00
Jonne Ransijn	1b3f8e1e9a	LibJS: Cache source code positions more often ... The source code position cache was moved from a line based approach to a "chunk"-based approach to improve performance on large, minified JavaScript files with few lines, but this has had an adverse effect on _multi-line_ source files. Reintroduce some of the old behaviour by caching lines again, with some added sanity limits to avoid caching empty/overly small lines. Source code positions in files with few lines will still be cached less often, since minified JavaScript files can be assumed to be unusually large, and since stack traces for minified JavaScript are less useful as well. On WPT tests with large JavaScript dependencies like `css/css-masking/animations/clip-interpolation.html` this reduces the amount of time spent in `SourceCode::range_from_offsets` by as much as 99.98%, for the small small price of 80KB extra memory usage.	2024-12-02 11:42:11 +01:00
Timothy Flynn	93712b24bf	Everywhere: Hoist the Libraries folder to the top-level	2024-11-10 12:50:45 +01:00

Renamed from Userland/Libraries/LibJS/SourceCode.cpp (Browse further)