replace current_span_length in favor of parameters_changed #750

# to view logs

Job	Run time
Tests (macos-latest, stable)	43s
Tests (macos-latest, beta)	41s
Tests (macos-latest, nightly)	32s
Tests (windows-latest, stable)	1m 35s
Tests (windows-latest, beta)	1m 36s
Tests (windows-latest, nightly)	1m 4s
Tests (ubuntu-latest, stable)	19s
Tests (ubuntu-latest, beta)	33s
Tests (ubuntu-latest, nightly)	30s
	7m 33s

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