Implement Metrics::timing (#1670) #1005

Job	Run time
Tests (ubuntu-latest, 7.2, lowest)	23s
Tests (ubuntu-latest, 7.2, highest)	29s
Tests (ubuntu-latest, 7.3, lowest)	21s
Tests (ubuntu-latest, 7.3, highest)	48s
Tests (ubuntu-latest, 7.4, lowest)	23s
Tests (ubuntu-latest, 7.4, highest)	49s
Tests (ubuntu-latest, 8.0, lowest)	15s
Tests (ubuntu-latest, 8.0, highest)	52s
Tests (ubuntu-latest, 8.1, lowest)	14s
Tests (ubuntu-latest, 8.1, highest)	57s
Tests (ubuntu-latest, 8.2, lowest)	14s
Tests (ubuntu-latest, 8.2, highest)	50s
Tests (ubuntu-latest, 8.3, lowest)	20s
Tests (ubuntu-latest, 8.3, highest)	54s
Tests (windows-latest, 7.2, lowest)	57s
Tests (windows-latest, 7.2, highest)	55s
Tests (windows-latest, 7.3, lowest)	55s
Tests (windows-latest, 7.3, highest)	1m 35s
Tests (windows-latest, 7.4, lowest)	53s
Tests (windows-latest, 7.4, highest)	1m 33s
Tests (windows-latest, 8.0, lowest)	56s
Tests (windows-latest, 8.0, highest)	1m 45s
Tests (windows-latest, 8.1, lowest)	54s
Tests (windows-latest, 8.1, highest)	1m 34s
Tests (windows-latest, 8.2, lowest)	49s
Tests (windows-latest, 8.2, highest)	1m 23s
Tests (windows-latest, 8.3, lowest)	45s
Tests (windows-latest, 8.3, highest)	1m 24s
	24m 7s

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