Add speculative_count to memory calculation #360

Job	Run time
test (pre, default, ubuntu-latest)	3m 21s
test (pre, x86, ubuntu-latest)	3m 5s
test (1, x86, ubuntu-latest)	3m 28s
test (1, default, macOS-latest)	3m 11s
test (min, x86, windows-latest)	3m 37s
test (pre, default, windows-latest)	4m 0s
test (nightly, default, ubuntu-latest)	2m 17s
test (min, default, ubuntu-latest)	2m 33s
test (min, default, windows-latest)	3m 38s
test (1, default, windows-latest)	4m 23s
test (1, x86, windows-latest)	5m 0s
test (min, x86, ubuntu-latest)	3m 22s
test (1, default, ubuntu-latest)	3m 17s
test (pre, x86, windows-latest)	4m 7s
test (nightly, default, windows-latest)	2m 25s
test (min, default, macOS-latest)	2m 16s
test (nightly, x86, windows-latest)	3m 9s
test (nightly, default, macOS-latest)	2m 9s
test (nightly, x86, ubuntu-latest)	2m 30s
test (pre, default, macOS-latest)	3m 39s
	1h 5m 27s

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