Theme	Dataset
	Default		10K
Generic version for any input
Key ideas from the start	13.490		17.991
Optimized generic float parsing	6.551	-51.4%	10.720	-40.4%
Optimized hash function	6.313	-3.6%	10.384	-3.1%
Using the input specs
Parse numbers as integers	5.229	-17.2%	8.627	-16.9%
Set dictionary capacity	4.341	-17.0%	8.951	3.8%
Optimized IndexOf	4.040	-6.9%	8.609	-3.8%
Use native integers everywhere	3.693	-8.6%	8.604	-0.1%
Use a custom dictionary	3.272	-11.4%	8.232	-4.3%
Fast Utf8Span.Equals	2.773	-15.3%	6.635	-19.4%
Optimize the inner loop	2.191	-21.0%	4.811	-27.5%
Low dictionary load factor	2.219	1.3%	4.185	-13.0%
Making it even faster
Faster Utf8Span.Equals	2.148	-3.2%	4.052	-3.2%
Better hash function	2.140	-0.4%	4.024	-0.7%
Smaller hot path, non inline rare paths	2.062	-3.6%	3.751	-6.8%
Init Summary during Add	2.025	-1.8%	3.752	0.0%
Copy keys to dict, better cache locality	1.975	-2.5%	3.394	-9.5%
ParseInt starts from semicolon	1.945	-1.5%	3.406	0.4%
Break chunks unevenly and munmap at different times	1.814	-6.7%	3.256	-4.4%
Misc micro-optimizations	1.791	-1.3%	3.213	-1.3%
Final push
Final results, multiple changes	1.491	-16.8%	2.907	-9.5%
Windows has slow mmap
Last Linux (mmap based)	2.611		4.064
Use async RandomAccess on Windows	2.041	-21.8%	3.598	-11.5%