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Speed up cupy with custom kernels

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
42/100
Issue type
Refactor
Clarity
Mostly clear
Activity status
Stale
Tech stack
python
Domain
performance

Research direction

Start with src/rapids_singlecell/preprocessing/_kernels/_mean_var_kernel.py and src/rapids_singlecell/preprocessing/_kernels/_sparse2dense.py, then compare the current kernels with the CuPy support introduced in #51. Done means the sum, mean_var, and related operations are faster with the custom kernels.

Written by the indexing model from the issue text.

Description

type: cupy

rapids-singlecell has some CuPy kernels for sum, mean_var, and so on.

Our current CuPy support as of #51 is probably much slower.

Dominant language
Python
Stars
15
Forks
5
Avg merge
10h 33m
Merged PRs (30d)
9

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