Enhance benchmark with comprehensive SET/GET/DELETE testing

[bisho]

Enhanced benchmark script with comprehensive testing and realistic data patterns

This PR significantly improves the benchmark script to provide more realistic and comprehensive performance testing:

What changed:

• Replaced mock socket implementation with real server connections only (removed FakeSocket and related fake connection logic, as it was too synthetic and unrealistic)
• Added comprehensive benchmark phases: SET, GET, and DELETE operations with detailed performance reporting
• Implemented realistic data patterns with mixed value sizes (95% small values 80-250B, 5% large values 100KB)
• Enhanced the benchmark to pre-populate 80% of keyspace for realistic hit/miss ratios during GET operations
• Switched from MixedSerializer to ZstdSerializer with compression effectively disabled for cleaner performance measurement
• Added detailed GC tracking across all benchmark phases to monitor memory behavior
• Made server parameter required since mock functionality was removed
• Updated meta-memcache-socket dependency from >= 0.1.3 to >= 0.1.7

Why these changes:

• The previous benchmark only tested GET operations against mocked responses, which doesn't reflect real-world performance
• Mixed value sizes better represent actual cache usage patterns where most values are small but some are significantly larger
• Multi-phase testing (SET/GET/DELETE) provides a complete picture of cache client performance
• Real server connections give accurate performance metrics instead of artificial mock results
• Enhanced GC tracking helps identify memory leaks or excessive object creation during operations

The benchmark now provides actionable performance insights for all major cache operations under realistic conditions.

[bisho]

• Add batch multi-get execution for improved performance #83
• Make key encoder optional and remove default implementation #82
• Replace command building with direct socket method calls #81
• Migrate MemcacheSocket implementation to Rust #80
• Enhance benchmark with comprehensive SET/GET/DELETE testing #79 👈 (View in Graphite)
• main

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[xmartinez]

LG!

[bisho]

Merge activity

• Mar 26, 3:31 PM UTC: A user started a stack merge that includes this pull request via Graphite.
• Mar 26, 3:32 PM UTC: @bisho merged this pull request with Graphite.