improve comments #15004

Job	Run time
build	1m 26s
addlicense	13s
lint	1m 38s
test-race	6m 24s
test (windows)	5m 11s
test (ubuntu)	5m 13s
python-lint	11s
test-default-collection	4m 50s
test (macos)	5m 25s
test-stats-definition-exporter (ubuntu-latest)	1m 21s
test-sgcollect (windows-latest)	3m 21s
test-stats-definition-exporter (windows-latest)	2m 9s
test-sgcollect (ubuntu-latest)	26s
build cache perf tool	1m 15s
test-sgcollect (macos-latest)	1m 2s
python-format	11s
test-stats-definition-exporter (macos-latest)	1m 20s
	41m 36s

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