Add a benchmark utility and start using it
This is a minimal integration of google benchmark in order to check that some of the future changes actually bring something to the balance.
In order to try it, this MR also includes an optimization of the utils::url::decode function.
Before:
----------------------------------------------------------------
Benchmark Time CPU Iterations
----------------------------------------------------------------
BenchUrlDecode 198 ns 198 ns 3412650
BenchUrlDecode 198 ns 198 ns 3412650
BenchUrlDecode 207 ns 207 ns 3412650
BenchUrlDecode 211 ns 211 ns 3412650
BenchUrlDecode 209 ns 209 ns 3412650
BenchUrlDecode 209 ns 209 ns 3412650
BenchUrlDecode 206 ns 206 ns 3412650
BenchUrlDecode 214 ns 214 ns 3412650
BenchUrlDecode 218 ns 218 ns 3412650
BenchUrlDecode 223 ns 223 ns 3412650
BenchUrlDecode_mean 209 ns 209 ns 10
BenchUrlDecode_median 209 ns 209 ns 10
BenchUrlDecode_stddev 7.85 ns 7.85 ns 10
BenchUrlDecode_cv 3.75 % 3.75 % 10after:
----------------------------------------------------------------
Benchmark Time CPU Iterations
----------------------------------------------------------------
BenchUrlDecode 91.1 ns 91.1 ns 7736626
BenchUrlDecode 88.4 ns 88.4 ns 7736626
BenchUrlDecode 88.5 ns 88.5 ns 7736626
BenchUrlDecode 88.9 ns 88.9 ns 7736626
BenchUrlDecode 89.4 ns 89.4 ns 7736626
BenchUrlDecode 87.9 ns 87.9 ns 7736626
BenchUrlDecode 88.6 ns 88.6 ns 7736626
BenchUrlDecode 89.1 ns 89.1 ns 7736626
BenchUrlDecode 88.2 ns 88.2 ns 7736626
BenchUrlDecode 88.6 ns 88.6 ns 7736626
BenchUrlDecode_mean 88.9 ns 88.8 ns 10
BenchUrlDecode_median 88.6 ns 88.6 ns 10
BenchUrlDecode_stddev 0.898 ns 0.897 ns 10
BenchUrlDecode_cv 1.01 % 1.01 % 10which is a 57.5% improvement