build

Improve `PerformanceMetricsStorageTransformer` docs #120

Job	Run time
clippy	1m 17s
test	1m 58s
fmt	52s
build (stable, --features "")	1m 30s
build (stable, --all-features)	2m 4s
build (stable, --no-default-features)	59s
build (1.71, --features "")	29s
build (1.71, --all-features)	1m 55s
build (1.71, --no-default-features)	27s
build (beta, --features "")	26s
build (beta, --all-features)	2m 20s
build (beta, --no-default-features)	41s
build (nightly, --features "")	2m 54s
build (nightly, --all-features)	1m 58s
build (nightly, --no-default-features)	42s
	20m 32s

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