replace current_span_length in favor of parameters_changed #745

# to view logs

Job	Run time
Tests (macos-latest, stable)	50s
Tests (macos-latest, beta)	45s
Tests (macos-latest, nightly)	39s
Tests (windows-latest, stable)	1m 41s
Tests (windows-latest, beta)	1m 19s
Tests (windows-latest, nightly)	1m 40s
Tests (ubuntu-latest, stable)	19s
Tests (ubuntu-latest, beta)	36s
Tests (ubuntu-latest, nightly)	34s
	8m 23s

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