optimize url::can_parse method

[anonrig]

Significantly improves the performance of can_parse method.

Before merging, I need to do some cleaning and move methods to correct places, add documentation etc.

[codecov]

Codecov Report

❌ Patch coverage is 63.75839% with 54 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.64%. Comparing base (a3cbb2c) to head (5376065).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/implementation.cpp	66.34%	4 Missing and 31 partials ⚠️
src/url_aggregator.cpp	0.00%	7 Missing and 1 partial ⚠️
src/url.cpp	20.00%	0 Missing and 4 partials ⚠️
include/ada/url_aggregator-inl.h	0.00%	0 Missing and 2 partials ⚠️
src/parser.cpp	60.00%	1 Missing and 1 partial ⚠️
include/ada/url.h	75.00%	0 Missing and 1 partial ⚠️
include/ada/url_aggregator.h	75.00%	0 Missing and 1 partial ⚠️
include/ada/url_search_params-inl.h	87.50%	0 Missing and 1 partial ⚠️

❌ Your patch check has failed because the patch coverage (63.75%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1106      +/-   ##
==========================================
+ Coverage   59.61%   59.64%   +0.03%     
==========================================
  Files          37       37              
  Lines        5851     5957     +106     
  Branches     2851     2907      +56     
==========================================
+ Hits         3488     3553      +65     
- Misses        586      595       +9     
- Partials     1777     1809      +32     

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[codspeed-hq]

Merging this PR will improve performance by ×3.4

⚡ 4 improved benchmarks
✅ 23 untouched benchmarks
⏩ 4 skipped benchmarks¹

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
⚡	Bench_BasicBench_AdaURL_CanParse	18.1 µs	13.5 µs	+34.18%
⚡	BBC_BasicBench_AdaURL_CanParse	12 µs	3.5 µs	×3.4
⚡	Bench_IPv4_NonDecimal_Aggregator	5.4 ms	5.1 ms	+5.83%
⚡	BenchData_BasicBench_AdaURL_CanParse	66.6 ms	21.7 ms	×3.1

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_{Comparing yagiz/optimize-canparse (5376065) with main (ed4fa6c)}

Footnotes

1. 4 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[Copilot]

Pull request overview

This PR introduces new fast paths intended to improve URL parsing and validation performance, primarily by short-circuiting the full WHATWG state machine for common absolute special-URL cases.

Changes:

• Added try_parse_fast() builders for ada::url and ada::url_aggregator, and wired them into parser::parse_url_impl() when no base URL is provided.
• Refactored parser::parse_url_impl to remove the store_values template parameter and adjusted friend/template declarations accordingly.
• Replaced ada::can_parse() implementation with a custom “zero-allocation” validator plus a fast-path precheck.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
src/url_aggregator.cpp	Adds url_aggregator::try_parse_fast() single-pass constructor for common absolute special URLs.
src/url.cpp	Adds url::try_parse_fast() counterpart populating ada::url fields directly.
src/parser.cpp	Uses the new try_parse_fast() methods before the full parser; removes store_values branching.
src/implementation.cpp	Reimplements can_parse() with new fast-path and zero-alloc fallback logic.
include/ada/url_aggregator.h	Declares url_aggregator::try_parse_fast() and updates parser friend declarations.
include/ada/url.h	Declares url::try_parse_fast() and updates parser friend declarations.
include/ada/parser.h	Updates parse_url_impl template signature (removes store_values).

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[Copilot]

Pull request overview

Copilot reviewed 10 out of 27 changed files in this pull request and generated 7 comments.

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[CarlosEduR]

Exciting!

Looks like fuzzers aren't happy yet with: ws:.

[anonrig]

@lemire would you mind reviewing?