Add benchstat GH action

[janezpodhostnik]

Description

Add a github action to output performance changes with the base branch of a PR using benchstat.

See https://github.com/janezpodhostnik/cadence/pull/1#issuecomment-964450162 for sample output.

---

• Targeted PR against master branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• Code follows the standards mentioned here
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[codecov-commenter]

Codecov Report

Merging #1227 (2178eb7) into master (e8500a0) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1227   +/-   ##
=======================================
  Coverage   77.40%   77.40%           
=======================================
  Files         273      273           
  Lines       34821    34821           
=======================================
  Hits        26953    26953           
  Misses       6793     6793           
  Partials     1075     1075           

Flag	Coverage Δ
unittests	77.40% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e8500a0...2178eb7. Read the comment docs.

[github-actions]

Cadence Benchstat comparison

This branch with compared with the base branch onflow:master commit e8500a0
The command go test ./... -run=XXX -bench=. -shuffle=on -count N was used.
Bench tests were run a total of 7 times on each branch.

Results

	old.txt	new.txt
	time/op		delta
RuntimeStorageWriteCached-2	169µs ± 2%	228µs ±26%	+34.91%	(p=0.011 n=7+7)
ParseFungibleToken-2	559µs ± 3%	583µs ± 2%	+4.24%	(p=0.001 n=7+7)
ParseInfix-2	28.9µs ± 1%	29.7µs ± 2%	+2.76%	(p=0.002 n=7+7)
InterpretRecursionFib-2	3.25ms ± 2%	3.34ms ± 4%	+2.75%	(p=0.002 n=7+7)
RuntimeResourceDictionaryValues-2	20.3ms ± 3%	20.5ms ± 2%	~	(p=0.620 n=7+7)
RuntimeFungibleTokenTransfer-2	1.52ms ± 3%	1.56ms ± 7%	~	(p=0.259 n=7+7)
ParseDeploy/byte_array-2	41.6ms ± 1%	42.4ms ± 4%	~	(p=0.181 n=6+7)
ParseDeploy/decode_hex-2	1.71ms ± 1%	1.72ms ± 3%	~	(p=0.259 n=7+7)
ParseArray-2	27.8ms ± 5%	27.8ms ± 3%	~	(p=0.805 n=7+7)
QualifiedIdentifierCreation/Three_levels-2	203ns ± 3%	202ns ± 2%	~	(p=0.535 n=7+7)
ContractInterfaceFungibleToken-2	58.5µs ± 2%	59.9µs ± 3%	~	(p=0.101 n=6+7)
CheckContractInterfaceFungibleTokenConformance-2	209µs ± 5%	209µs ± 2%	~	(p=0.902 n=7+7)
NewInterpreter/new_interpreter-2	1.42µs ± 1%	1.43µs ± 2%	~	(p=0.511 n=6+6)
NewInterpreter/new_sub-interpreter-2	2.54µs ± 2%	2.50µs ± 2%	−1.51%	(p=0.026 n=7+7)
QualifiedIdentifierCreation/One_level-2	3.86ns ± 2%	3.78ns ± 0%	−1.99%	(p=0.020 n=7+6)
	alloc/op		delta
RuntimeResourceDictionaryValues-2	4.33MB ± 0%	4.33MB ± 0%	~	(p=0.383 n=7+7)
RuntimeStorageWriteCached-2	83.7kB ± 0%	83.7kB ± 0%	~	(p=0.152 n=6+6)
QualifiedIdentifierCreation/One_level-2	0.00B	0.00B	~	(all equal)
QualifiedIdentifierCreation/Three_levels-2	64.0B ± 0%	64.0B ± 0%	~	(all equal)
ContractInterfaceFungibleToken-2	26.7kB ± 0%	26.7kB ± 0%	~	(all equal)
InterpretRecursionFib-2	1.21MB ± 0%	1.21MB ± 0%	~	(all equal)
NewInterpreter/new_interpreter-2	680B ± 0%	680B ± 0%	~	(all equal)
NewInterpreter/new_sub-interpreter-2	1.02kB ± 0%	1.02kB ± 0%	~	(all equal)
CheckContractInterfaceFungibleTokenConformance-2	66.4kB ± 0%	66.4kB ± 0%	−0.00%	(p=0.009 n=7+6)
RuntimeFungibleTokenTransfer-2	225kB ± 0%	225kB ± 0%	−0.01%	(p=0.030 n=7+7)
	allocs/op		delta
RuntimeResourceDictionaryValues-2	108k ± 0%	108k ± 0%	~	(p=0.421 n=7+6)
RuntimeStorageWriteCached-2	1.42k ± 0%	1.42k ± 0%	~	(all equal)
RuntimeFungibleTokenTransfer-2	4.38k ± 0%	4.38k ± 0%	~	(p=0.694 n=7+7)
QualifiedIdentifierCreation/One_level-2	0.00	0.00	~	(all equal)
QualifiedIdentifierCreation/Three_levels-2	2.00 ± 0%	2.00 ± 0%	~	(all equal)
ContractInterfaceFungibleToken-2	458 ± 0%	458 ± 0%	~	(all equal)
CheckContractInterfaceFungibleTokenConformance-2	1.07k ± 0%	1.07k ± 0%	~	(all equal)
InterpretRecursionFib-2	25.0k ± 0%	25.0k ± 0%	~	(all equal)
NewInterpreter/new_interpreter-2	11.0 ± 0%	11.0 ± 0%	~	(all equal)
NewInterpreter/new_sub-interpreter-2	30.0 ± 0%	30.0 ± 0%	~	(all equal)

[SupunS]

Thank you for adding this! Looks good!

[turbolent]

This is great! Thank you for adding this 👏