fix: optimize golomb encoding/decoding and improve error handling

[kalbasit]

This commit addresses performance concerns raised in PR 564.

Changes:

• Optimizes EncodeBig and DecodeBig in pkg/golomb to use uint64 arithmetic for quotient operations when possible, avoiding expensive big.Int allocations and operations for common cases.
• Updates pkg/golomb/golomb_test.go to properly handle errors from Flush().

This significantly reduces the overhead of Golomb coding for standard integer sizes while maintaining correctness for arbitrarily large numbers.

Follow-up on #564 that I merged prematurely by accident.

[dosubot]

Related Documentation

Checked 1 published document(s) in 0 knowledge base(s). No updates required.

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[gemini-code-assist]

Summary of Changes

Hello @kalbasit, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces significant performance enhancements to the Golomb encoding and decoding mechanisms by intelligently utilizing uint64 arithmetic for common cases, thereby minimizing the overhead associated with big.Int operations. This optimization aims to speed up processing for typical integer sizes while preserving the ability to handle arbitrarily large numbers correctly. Additionally, it refines error handling within the test suite to ensure greater reliability.

Highlights

• Performance Optimization: Optimized EncodeBig and DecodeBig functions in pkg/golomb to leverage uint64 arithmetic for quotient operations when possible, significantly reducing reliance on expensive big.Int allocations and operations for common integer sizes.
• Error Handling Improvement: Enhanced error handling in pkg/golomb/golomb_test.go by ensuring that the error returned from Flush() is properly checked, improving test robustness.

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[kalbasit]

• fix: optimize golomb encoding/decoding and improve error handling #567 👈 (View in Graphite)
• main

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[gemini-code-assist]

Code Review

This pull request effectively optimizes Golomb encoding and decoding for common cases by preferring uint64 arithmetic over big.Int operations, which is a significant performance improvement. The logic for both EncodeBig and DecodeBig is sound, and the update to improve error handling in the test suite is a welcome addition.