Go Version Performance Tracking

Interactive tool to compare benchmark performance across Go releases.

Interactive Comparison Tool

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Methodology

Benchmarks run with rigorous controls for consistency:

• Iterations: 20 runs per benchmark
• Benchtime: 3 seconds per iteration
• Comparison: Direct calculation of mean performance deltas between versions
• System Validation: CPU governor, load, and temperature checks before each run
• Hardware: Consistent CPU configuration across all runs

For CLI analysis with statistical significance testing, we use benchstat.

Technical details: perf-tracking documentation

Current Benchmark Suite

Core allocation patterns (5 benchmarks):

Benchmark	Description	Category
SmallAllocation	64-byte allocation	Memory
LargeAllocation	1MB allocation	Memory
MapAllocation	Map with 100 entries	Data Structures
SliceAppend	Slice growth (1000 appends)	Data Structures
GCPressure	Allocation under GC pressure	GC Behavior

Coming Soon: Expanded coverage for stdlib, networking, and crypto (Phase 5).

Key Findings

Go 1.23 → 1.24

• Overall: 25.11% faster (geomean)
• MapAllocation: 57% faster, 50% fewer allocations (6→3 allocs/op)
• SmallAllocation: 22% faster
• LargeAllocation: 21% faster

Go 1.24 → 1.25

• Overall: Stable performance (no significant regressions)
• All benchmarks within statistical noise threshold

About This Data

Results collected using:

• Go's standard testing package benchmarks
• Statistical validation with benchstat
• Local runs on consistent hardware

All benchmark source code: perf-tracking/benchmarks/