Speed up popularity scoring and top-N ranking #970

Job	Run time
Conda Python py311 on ubuntu-latest	6m 9s
FunkSVD tests on Python py311	38s
Minimal dependency tests for FunkSVD	40s
Conda Python py311 on macos-latest	3m 24s
FunkSVD tests on Python py312	40s
Implicit bridge tests on Python py311	40s
Conda Python py311 on windows-latest	10m 56s
Conda Python py312 on ubuntu-latest	6m 43s
Implicit bridge tests on Python py312	48s
Non-JIT test coverage	4m 44s
Conda Python py312 on macos-latest	4m 52s
Conda Python py312 on windows-latest	10m 51s
Minimal dependency tests for Scikit-Learn	26s
Conda Python py313 on ubuntu-latest	6m 17s
Scikit-Learn tests on Python py311	30s
Minimal dependency tests	6m 6s
Conda Python py313 on macos-latest	3m 35s
Vanilla Python 3.11 on ubuntu-latest	5m 56s
Vanilla Python 3.11 on macos-latest	2m 43s
Scikit-Learn tests on Python py312	29s
Vanilla Python 3.12 on ubuntu-latest	7m 21s
Scikit-Learn tests on Python py313	33s
Vanilla Python 3.12 on macos-latest	3m 4s
Vanilla Python 3.13 on ubuntu-latest	7m 27s
Demos, examples, and docs	2m 20s
Evaluation-based tests	1m 41s
HPF bridge tests on Python py311	59s
HPF bridge tests on Python py312	1m 0s
Minimal dependency tests for Implicit	33s
Test suite results	23s
	1h 42m 28s

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