Optimize path, join, and removeNullOrUndef functions for performance and clarity, introduce regex pre-compilation, and improve path parameter validation.

[hckhanh]

This release focuses on performance optimizations for path and parameter handling utilities in src/index.ts. The main improvements include reducing regex recompilation overhead, optimizing string manipulation for path joining, and making parameter filtering faster by avoiding unnecessary object allocations.

Performance optimizations:

• Pre-compiled the path parameter regex (PATH_PARAM_REGEX) to avoid recompiling it on every call, improving efficiency in the path function.
• Rewrote the join function to use direct string indexing instead of endsWith/startsWith, and added fast paths for empty strings and common URL joining cases, reducing unnecessary string slicing and improving speed.

Parameter handling improvements:

• Optimized removeNullOrUndef by checking for null/undefined values before allocating a new object, and using direct property iteration instead of Object.entries/Object.fromEntries, resulting in faster execution and less memory usage.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (5a1fe77) to head (355d420).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #82   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            3         3           
  Lines          191       216   +25     
  Branches        63        73   +10     
=========================================
+ Hits           191       216   +25     

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[Copilot]

Pull Request Overview

This PR optimizes the path function by adding a fast-path early return for templates that don't contain parameter placeholders (:param patterns), avoiding unnecessary object cloning and regex operations.

Key changes:

• Added an early return check using indexOf(':') to detect templates without parameters
• Added blank lines to improve code readability

---

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[codspeed-hq]

CodSpeed Performance Report

Merging #82 will improve performances by 44.55%

_{Comparing optimize (355d420) with main (5a1fe77)}

Summary

⚡ 19 improvements
✅ 139 untouched
⏩ 22 skipped¹

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	Join with separator at end of first part	17 µs	15.4 µs	+10.62%
⚡	Join URL with trailing slash	16.8 µs	14.4 µs	+16.23%
⚡	Complex URL with many params (original test)	182.2 µs	141.3 µs	+28.97%
⚡	Deep path with 5 parameters	118.4 µs	100.8 µs	+17.49%
⚡	Large query string (15 params)	151.5 µs	104.8 µs	+44.55%
⚡	Large query string (15 params) with some path params	166.6 µs	120.3 µs	+38.47%
⚡	Array in query params	84.7 µs	67.5 µs	+25.46%
⚡	Base template only (no path)	98.2 µs	80.5 µs	+22.09%
⚡	Boolean and number params	113.8 µs	94.4 µs	+20.5%
⚡	Multiple query params (5 params)	111.2 µs	86.4 µs	+28.69%
⚡	Path params with special characters	113.1 µs	96.4 µs	+17.34%
⚡	Two path params + two query params	112.6 µs	100.6 µs	+11.92%
⚡	REST API endpoint with pagination	85.7 µs	74.8 µs	+14.64%
⚡	Resource with ID and nested resource	101.8 µs	84.8 µs	+20.05%
⚡	Search endpoint with filters	96.1 µs	72.6 µs	+32.37%
⚡	URL with port number	99.8 µs	82.3 µs	+21.18%
⚡	Base URL with trailing slash + path	31 µs	25.4 µs	+21.89%
⚡	Concatenate base URL and path only	76.6 µs	67.1 µs	+14.02%
⚡	Single query parameter	92.9 µs	72.5 µs	+28.13%

Footnotes

1. 22 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. ↩

[hckhanh]

@copilot analyze this PR and add changesets to .changeset/petite-pumas-flash.md

[Copilot]

@hckhanh I've opened a new pull request, #84, to work on those changes. Once the pull request is ready, I'll request review from you.

[hckhanh]

@copilot add to copilot instruction:

How to add changesets

1. Run changeset add to generate changeset file
2. Fill out release changes for the changesets.

[Copilot]

@hckhanh I've opened a new pull request, #85, to work on those changes. Once the pull request is ready, I'll request review from you.

[sonarqubecloud]

Quality Gate passed

Issues
4 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud