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POC: Perf/handlebars v2 parser - #13

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johanrd wants to merge 24 commits into

mainfrom

perf/handlebars-v2-parser

Draft

POC: Perf/handlebars v2 parser#13
johanrd wants to merge 24 commits into
mainfrom
perf/handlebars-v2-parser

Commits on Apr 16, 2026
- test: parser escape-sequence, whitespace-control, and error-case contract tests
  johanrd
  committed
  a787436
- Replace Jison-generated HBS parser with hand-written recursive descent (v2-parser)
  johanrd
  committed
  edb0cac
- fix all location tracking bugs in v2-parser
  johanrd
  committed
  babf026
- fix hash loc on multi-line mustaches
  johanrd
  committed
  c8215bd
- fix infinite loop on escaped mustaches, add 181 stress tests
  johanrd
  committed
  c9f1dfa
- fix multiple escaped mustaches, match Jison content splitting
  johanrd
  committed
  7c83881
- fix hash pair loc: don't consume trailing whitespace in sub-expressions
  johanrd
  committed
  c172b12
- add round 3 stress tests: 1541 tests from real codebases + fuzzing
  johanrd
  committed
  a3642c5
- p
  johanrd
  committed
  6c4d815
- bench full pipeline
  johanrd
  committed
  6264ccc
- cl
  johanrd
  committed
  b0b6072
- Update comment to reflect parser's purpose
  johanrd
  committed
  2b83ea2
- Update file paths to real-world-project
  johanrd
  committed
  7685847
- Update stress test project directory path
  johanrd
  committed
  6c6a0e6
- Update file paths for V2 and V2_SYNTAX
  johanrd
  committed
  36a59ed
- style: lint/prettier fixes for POC investigation files
  johanrd
  committed
  3b43865
- Wire v2-parser into default preprocess, delete @handlebars/parser package
  johanrd
  committed
  6b8c0db
- fix(v2-parser): emit Jison-compatible 'Expecting ID' error for bad path starts
  johanrd
  committed
  338c54c
- fix(v2-parser): correct escape handling so \\{{ is literal backslash + real mustache
  johanrd
  committed
  e51aaef
Commits on Apr 17, 2026
Commits on Apr 20, 2026
- Merge origin/main into perf/handlebars-v2-parser
  johanrd
  committed
  46a29d6

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POC: Perf/handlebars v2 parser - #13

POC: Perf/handlebars v2 parser#13
johanrd wants to merge 24 commits into
mainfrom
perf/handlebars-v2-parser

Commits on Apr 16, 2026

test: parser escape-sequence, whitespace-control, and error-case contract tests

Replace Jison-generated HBS parser with hand-written recursive descent (v2-parser)

fix all location tracking bugs in v2-parser

fix hash loc on multi-line mustaches

fix infinite loop on escaped mustaches, add 181 stress tests

fix multiple escaped mustaches, match Jison content splitting

fix hash pair loc: don't consume trailing whitespace in sub-expressions

add round 3 stress tests: 1541 tests from real codebases + fuzzing

p

bench full pipeline

cl

Update comment to reflect parser's purpose

Update file paths to real-world-project

Update stress test project directory path

Update file paths for V2 and V2_SYNTAX

style: lint/prettier fixes for POC investigation files

Wire v2-parser into default preprocess, delete @handlebars/parser package

fix(v2-parser): emit Jison-compatible 'Expecting ID' error for bad path starts

fix(v2-parser): correct escape handling so \\{{ is literal backslash + real mustache

Commits on Apr 17, 2026

revert: accept digit path segments (matches real-world Ember usage)

test: add escaped literal with newline inside brackets

fix: narrow PathHead to VarHead before accessing .name (TS2339)

style: use module() callback form, match #21317 format

Commits on Apr 20, 2026

Merge origin/main into perf/handlebars-v2-parser