giles 54adc9c216 Add TCO for parser loops in JS bootstrapper, enable SX_USE_REF ...

The JS parser transpiled from parser.sx used tail-recursive functions
(readStrLoop, skipWs, readListLoop, etc.) which overflow the stack on
large inputs — the bootstrapper page highlights 100KB of Python and
143KB of JavaScript, producing 7620 spans in a 907KB response.

The bootstrapper now detects zero-arg self-tail-recursive functions and
emits them as while(true) loops with continue instead of recursive
calls. Tested with 150K char strings and 8000 sibling elements.

Also enables SX_USE_REF=1 in dev via x-dev-env anchor.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-03-05 23:09:02 +00:00

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