Scan until next special char (", \, \0, \c, \L) and append that slice once.

[planetis-m]

Benchmark comparison (-d:danger --mm:arc --debugger:native -d:useMalloc,
OpenAI file benchmark, 5 runs):

• Before: 0.196674934, 0.189423191, 0.198763300, 0.197125584, 0.205015032
• After: 0.182827130, 0.183330852, 0.174878542, 0.174360811, 0.181704921
• Median before: 0.197125584s
• Median after: 0.181704921s
• Improvement: 7.82% faster

Callgrind comparison (same build flags):

• Total Ir before: 3,219,477,120
• Total Ir after: 2,449,556,167
• Total Ir reduction: 23.91%

parseString hotspot:

• Before: 1,343,343,723 Ir
• After: 573,423,735 Ir
• Reduction: 57.31%

[planetis-m]

Sorry, I will add these back if the tests pass.

[planetis-m]

Error: undeclared identifier: 'copyMem'