Benchmarking tool using cost estimator #800

Job	Run time
Bitrot check	2m 51s
Intra-doc links	1m 24s
Rustfmt	12s
Build target wasm32-unknown-unknown	1m 32s
Build target wasm32-wasi	1m 28s
Test on ubuntu-latest with basic features	6m 47s
Test on windows-latest with basic features	8m 26s
Test on macOS-latest with basic features	10m 44s
Test on ubuntu-latest with all features	8m 39s
Test on windows-latest with all features	10m 30s
Test on macOS-latest with all features	15m 3s
	1h 7m 36s

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