Optimize IOSource#read_until method by using StringScanner#check_until(string)

[naitoh]

Why?

StringScanner#check_until(string) is faster than StringScanner#check_until(regex).

See:

• Accept String as a pattern at non head strscan#106
• Add scan and search benchmark strscan#111

Benchmark

RUBYLIB= BUNDLER_ORIG_RUBYLIB= /Users/naitoh/.rbenv/versions/3.3.4/bin/ruby -v -S benchmark-driver /Users/naitoh/ghq/github.com/naitoh/rexml/benchmark/parse.yaml
ruby 3.3.4 (2024-07-09 revision be1089c8ec) [arm64-darwin22]
Calculating -------------------------------------
before after before(YJIT) after(YJIT)
dom 19.459 19.840 35.035 35.786 i/s - 100.000 times in 5.139034s 5.040369s 2.854304s 2.794367s
sax 30.057 30.026 52.986 53.716 i/s - 100.000 times in 3.326998s 3.330499s 1.887303s 1.861652s
pull 33.777 34.415 62.294 64.020 i/s - 100.000 times in 2.960622s 2.905668s 1.605284s 1.562002s
stream 33.789 34.003 60.174 60.411 i/s - 100.000 times in 2.959521s 2.940916s 1.661845s 1.655334s
Comparison:
dom
after(YJIT): 35.8 i/s
before(YJIT): 35.0 i/s - 1.02x slower
after: 19.8 i/s - 1.80x slower
before: 19.5 i/s - 1.84x slower
sax
after(YJIT): 53.7 i/s
before(YJIT): 53.0 i/s - 1.01x slower
before: 30.1 i/s - 1.79x slower
after: 30.0 i/s - 1.79x slower
pull
after(YJIT): 64.0 i/s
before(YJIT): 62.3 i/s - 1.03x slower
after: 34.4 i/s - 1.86x slower
before: 33.8 i/s - 1.90x slower
stream
after(YJIT): 60.4 i/s
before(YJIT): 60.2 i/s - 1.00x slower
after: 34.0 i/s - 1.78x slower
before: 33.8 i/s - 1.79x slower

• YJIT=ON : 1.00x - 1.03x faster
• YJIT=OFF : 1.00x - 1.02x faster

[kou]

Thanks.