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Add benchmark suite and request timing#1

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cmyui merged 1 commit intochess-appfrom
benchmarks
Feb 7, 2026
Merged

Add benchmark suite and request timing#1
cmyui merged 1 commit intochess-appfrom
benchmarks

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@cmyui cmyui commented Feb 6, 2026 •
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Summary

  • Add make bench target with 13 microbenchmarks across 5 subsystems (slab allocator, database, string utilities, JSON builder, HTTP request parsing)
  • Add ARM64 Generic Timer driver (timer_read, timer_freq) using cntpct_el0/cntfrq_el0
  • Add per-request timing instrumentation in slowapi_handle — logs nanosecond wall-clock time to UART for every HTTP request

Sample output

========== RUNNING BENCHMARKS ==========

--- slab allocator ---
mem_alloc            | 1000 iters | min: 0 (0 ns) | avg: 36 (576 ns) | max: 7125 (114000 ns)
mem_free             | 1000 iters | min: 0 (0 ns) | avg: 29 (464 ns) | max: 625 (10000 ns)
alloc_free_cycle     | 1000 iters | min: 0 (0 ns) | avg: 39 (624 ns) | max: 2438 (39008 ns)

--- database ---
db_create            |  500 iters | min: 0 (0 ns) | avg: 62 (992 ns) | max: 10812 (172992 ns)
db_get               | 1000 iters | min: 0 (0 ns) | avg: 12 (192 ns) | max: 3438 (55008 ns)

--- request parsing ---
parse_request        |  500 iters | min: 0 (0 ns) | avg: 94 (1504 ns) | max: 14437 (230992 ns)

Live request timing:

[SlowAPI] request handled in 582000 ns
[SlowAPI] request handled in 70000 ns

Test plan

  • make — server builds clean
  • make test — all 60 tests pass
  • make bench — 13 benchmarks run with timing data
  • make run + curl — request timing prints to UART

🤖 Generated with Claude Code

@cmyui @claude
Add benchmark suite and request timing instrumentation
da7a1de 
Benchmark suite (make bench) measures operation latencies across all
major subsystems: slab allocator, database, string utilities, JSON
builder, and HTTP request parsing. Uses ARM64 Generic Timer for
nanosecond-precision measurements.

Request timing logs wall-clock time for every HTTP request handled
by slowapi_handle, printed to UART on completion.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
@cmyui cmyui changed the title benchmark suite v1 Add benchmark suite and request timing Feb 7, 2026
@cmyui cmyui merged commit 180e69a into chess-app Feb 7, 2026
@cmyui cmyui deleted the benchmarks branch February 7, 2026 17:58
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