feat: add perf walltime support #13

Performance Regression: -63.73%

❌ 37 regressions
✅ 5 untouched benchmarks
🆕 16 new benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

	Benchmark	`BASE`	`HEAD`	Change
❌	`BarTest[MyFixture]`	120.6 ns	166.1 ns	-27.42%
❌	`DoubleTest[MyTemplatedFixture, double]`	120.6 ns	166.1 ns	-27.42%
❌	`FooTest[MyFixture]`	120.6 ns	166.1 ns	-27.42%
❌	`IntTest[MyTemplatedFixture, int]`	120.6 ns	166.1 ns	-27.42%
❌	`TestA[MyTemplate1, int]`	120.6 ns	166.1 ns	-27.42%
❌	`TestB[MyTemplate2, int, double]`	120.6 ns	166.1 ns	-27.42%
❌	`BM_Capture[int_string_test]`	120.3 ns	195.3 ns	-38.41%
❌	`BM_Capture[int_test]`	91.4 ns	166.1 ns	-44.98%
❌	`BM_memcpy[4096]`	92.8 ns	196.9 ns	-52.89%
❌	`BM_memcpy[512]`	92.8 ns	196.9 ns	-52.89%
❌	`BM_memcpy[64]`	92.8 ns	196.9 ns	-52.89%
❌	`BM_memcpy[8192]`	92.8 ns	196.9 ns	-52.89%
❌	`BM_memcpy[8]`	92.8 ns	196.9 ns	-52.89%
❌	`BM_rand_vector`	91.4 ns	166.1 ns	-44.98%
🆕	`BM_sleep_100ms`	N/A	484.4 ns	N/A
🆕	`BM_sleep_100ns`	N/A	484.4 ns	N/A
🆕	`BM_sleep_100us`	N/A	513.6 ns	N/A
🆕	`BM_sleep_10ms`	N/A	513.6 ns	N/A
🆕	`BM_sleep_1ms`	N/A	513.6 ns	N/A
🆕	`BM_sleep_1ns`	N/A	484.4 ns	N/A
...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.