e3e0a2432c Add benchmark to write JSON into a string (Martin Ankerl)
Pull request description:
The benchmark `BlockToJsonVerbose` only tests generating (and destroying)
the JSON data structure, but serializing into a string is also a
performance critical aspect of the RPC calls.
Extracts test setup into a `struct TestBlockAndIndex`, and uses it in
both `BlockToJsonVerbose` and `BlockToJsonVerboseWrite`.
Also, use `ankerl::nanobench::doNotOptimizeAway` to make sure the compiler
can't optimize the result of the calls away.
Here are benchmark results on my Intel i7-8700:
| ns/op | op/s | err% | ins/op | cyc/op | IPC | bra/op | miss% | total | benchmark
|--------------------:|--------------------:|--------:|----------------:|----------------:|-------:|---------------:|--------:|----------:|:----------
| 71,807,017.00 | 13.93 | 0.4% | 555,782,961.00 | 220,788,645.00 | 2.517 | 102,279,341.00 | 0.4% | 0.80 | `BlockToJsonVerbose`
| 27,916,835.00 | 35.82 | 0.1% | 235,084,034.00 | 89,033,525.00 | 2.640 | 42,911,139.00 | 0.3% | 0.32 | `BlockToJsonVerboseWrite`
ACKs for top commit:
laanwj:
Code review ACK e3e0a2432c
Tree-SHA512: bc4d6d1588d47d4bd7af8e7908e44b8561bc391a2d73eccd7c0aa37fc40e8a9ce1fa1f3c29b416eef24a73c6bce3036839c0bbfe1b8dbd6d1bba3718b7ca5383
05e821ee19