jiter

[samuelcolvin]

Start moving to the new jiter JSON parser.

[codecov]

Codecov Report

Merging #974 (a9a8886) into main (ef3e813) will decrease coverage by 0.10%.
Report is 8 commits behind head on main.
The diff coverage is 83.03%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #974      +/-   ##
==========================================
- Coverage   93.35%   93.26%   -0.10%     
==========================================
  Files         106      104       -2     
  Lines       15999    15812     -187     
  Branches       35       35              
==========================================
- Hits        14936    14747     -189     
- Misses       1056     1058       +2     
  Partials        7        7              

Files	Coverage Δ
python/pydantic_core/__init__.py	92.59% <ø> (ø)
src/errors/line_error.rs	89.65% <ø> (ø)
src/errors/location.rs	97.14% <100.00%> (-0.21%)	⬇️
src/errors/mod.rs	92.30% <ø> (ø)
src/input/input_abstract.rs	86.76% <ø> (ø)
src/input/input_python.rs	98.56% <100.00%> (+<0.01%)	⬆️
src/input/mod.rs	100.00% <ø> (ø)
src/input/return_enums.rs	84.56% <100.00%> (-0.54%)	⬇️
src/input/shared.rs	97.39% <100.00%> (+0.78%)	⬆️
src/lookup_key.rs	92.81% <100.00%> (ø)
... and 10 more

... and 2 files with indirect coverage changes

---

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[codspeed-hq]

CodSpeed Performance Report

Merging #974 will degrade performances by 12.14%

_{Comparing jiter (a9a8886) with main (ef3e813)}

Summary

⚡ 3 improvements
❌ 1 regressions
✅ 136 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	jiter	Change
⚡	test_core_json_fs	779.6 µs	642.5 µs	+21.34%
❌	test_validate_literal[json-many_small_strings]	22 µs	25 µs	-12.14%
⚡	test_validate_literal[json-few_mixed]	34.6 µs	30.8 µs	+12.29%
⚡	test_decimal_from_string_core	69.2 µs	51.3 µs	+34.95%

[davidhewitt]

Nice to see +20% speedup, almost certainly genuine!

Just a few short comments.

[davidhewitt]

Suggested change

#jiter = {path = "../jiter", features = ["python"]}