Extract lightweight file transforms (truncateBase64, removeEmptyLines,
trim, showLineNumbers) into applyLightweightTransforms() on the main
thread, keeping only heavy operations (removeComments, compress) in
worker processContent(). This eliminates dual management of the same
logic across worker and main thread paths.
Also pre-compile base64 regex patterns at module level to avoid
re-creation per file call.
Action: split processContent into heavy (worker) and lightweight (main thread) phases
Action: extract applyLightweightTransforms() as single source of truth for lightweight ops
Action: hoist regex patterns in truncateBase64.ts to module scope with lastIndex reset
Why: lightweight transforms were duplicated in both processFilesMainThread and processContent
Why: regex re-compilation per file added unnecessary overhead for large repos
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Kazuki Yamada
Kazuki Yamada