Benchmarking tool using cost estimator #816

Job	Run time
Intra-doc links	1m 46s
Bitrot check	2m 46s
Build target wasm32-unknown-unknown	1m 53s
Rustfmt	12s
Build target wasm32-wasi	1m 56s
Test on ubuntu-latest with basic features	3m 46s
Test on windows-latest with basic features	5m 23s
Test on macOS-latest with basic features	6m 3s
Test on ubuntu-latest with all features	4m 36s
Test on windows-latest with all features	6m 38s
Test on macOS-latest with all features	8m 5s
	43m 4s

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