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Chris Tate
dec6be6ebd
A global replace or replaceAll of a regex literal called the compiled matcher once per match: each call set up its frame and seek again, and the runtime then copied the gap and the replacement. A substitution of a literal inside the compiled subset with an ASCII replacement without $ patterns now gets a replacer built for that pattern and replacement. It appends each gap and the replacement to the output and continues the search after the match, as the runtime's loop does (one past an empty match), without returning. Gaps of up to 16 bytes are one 16-byte copy, and the search after a match is a 16-byte scan instead of a memchr call. scr_regex_replace_with runs the replacer on an ASCII subject; a subject outside ASCII keeps the runtime's loop. Plain-text patterns, which the runtime searches as strings, get no replacer. New corpus program: 8351-regex-literal-replacers.ts.