fixed duration read and write benchmarks

[jasha26]

This Pull Request transitions our performance benchmarking suite from iteration-based to fixed-duration execution. By standardizing benchmarks to run for a set period (e.g., 60 seconds), we ensure that performance metrics are statistically significant and resilient to transient network fluctuations, providing a more reliable baseline for GCS operations.

Key Changes

• Fixed-Duration Logic: Refactored read and write benchmark scripts to execute loops based on a duration parameter rather than a fixed number of operations.
• Throughput Calculation: Updated reporting modules to calculate MiB/sec and IOPS based on the actual elapsed time and total data transferred.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 75.93%. Comparing base (d74b647) to head (a0359a6).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
gcsfs/tests/conftest.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #762      +/-   ##
==========================================
+ Coverage   75.39%   75.93%   +0.54%     
==========================================
  Files          19       19              
  Lines        2865     2888      +23     
==========================================
+ Hits         2160     2193      +33     
+ Misses        705      695      -10     

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[jasha26]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review. ✅ Project coverage is 75.79%. Comparing base (d74b647) to head (a0359a6). ⚠️ Report is 3 commits behind head on main.

Files with missing lines Patch % Lines
gcsfs/tests/conftest.py 0.00% 1 Missing ⚠️
Additional details and impacted files

@@            Coverage Diff             @@
##             main     #762      +/-   ##
==========================================
+ Coverage   75.39%   75.79%   +0.40%     
==========================================
  Files          19       19              
  Lines        2865     2888      +23     
==========================================
+ Hits         2160     2189      +29     
+ Misses        705      699       -6     

☔ View full report in Codecov by Sentry. 📢 Have feedback on the report? Share it here.

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Since the flagged file is conftest.py, i am ignoring this finding.

[ankitaluthra1]

/gcbrun