bench: replace dense-100k with github-100k scenario#36
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Replace the synthetic dense payload (many tiny k/v pairs) with a GitHub Issues API simulation that better reflects real-world API responses: nested user objects, labels arrays, realistic URL and timestamp strings, ~3-5% structural density. The new scenario provides a more meaningful benchmark for typical REST API parsing workloads.
Document the new GitHub Issues API simulation scenario that provides a realistic REST API benchmark with ~3-5% structural density.
Replace string.rep("A", size) with a pre-generated 64 KB block of
pseudo-random base64 characters (deterministic LCG, seed=12345).
Larger payloads repeat the block to reach target size.
This provides more realistic character distribution for CPU branch
prediction and cache behavior, while keeping O(1) payload generation.
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Summary
Benchmark Results
The previous dense-100k scenario had artificially high structural density (~10-12%) that doesn't reflect typical API usage patterns.