Speed up ImageChops operations

[akx]

Refs #9649, #9675, #9736, #9737 (same series, same techniques).

[codspeed-hq]

Merging this PR will improve performance by 95.74%

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 36 improved benchmarks
✅ 295 untouched benchmarks

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
⚡	test_chops[1024x1024-RGBA-add_modulo]	18.6 ms	6.5 ms	×2.8
⚡	test_chops[1024x1024-LA-add_modulo]	18.6 ms	6.5 ms	×2.8
⚡	test_chops[1024x1024-RGB-add_modulo]	18.6 ms	6.5 ms	×2.8
⚡	test_chops[1024x1024-L-add_modulo]	4.7 ms	1.7 ms	×2.8
⚡	test_chops[1024x1024-LA-darker]	26.8 ms	11 ms	×2.4
⚡	test_chops[1024x1024-LA-lighter]	26.8 ms	11 ms	×2.4
⚡	test_chops[1024x1024-RGBA-lighter]	26.8 ms	11 ms	×2.4
⚡	test_chops[1024x1024-RGBA-darker]	26.8 ms	11 ms	×2.4
⚡	test_chops[1024x1024-RGB-darker]	26.8 ms	11 ms	×2.4
⚡	test_chops[1024x1024-RGB-lighter]	26.8 ms	11 ms	×2.4
⚡	test_chops[1024x1024-L-lighter]	6.7 ms	2.8 ms	×2.4
⚡	test_chops[1024x1024-L-darker]	6.7 ms	2.8 ms	×2.4
⚡	test_chops[1024x1024-LA-add]	32.6 ms	14.1 ms	×2.3
⚡	test_chops[1024x1024-RGBA-add]	32.6 ms	14.1 ms	×2.3
⚡	test_chops[1024x1024-RGB-add]	32.6 ms	14.1 ms	×2.3
⚡	test_chops[1024x1024-L-add]	8.2 ms	3.6 ms	×2.3
⚡	test_chops[1024x1024-RGBA-subtract]	29.1 ms	14.4 ms	×2
⚡	test_chops[1024x1024-LA-subtract]	29.1 ms	14.4 ms	×2
⚡	test_chops[1024x1024-RGB-subtract]	29.1 ms	14.4 ms	×2
⚡	test_chops[1024x1024-L-subtract]	7.3 ms	3.7 ms	×2
...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

Tip

Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing akx:faster-chops (29314c7) with main (e234120)}

[akx]

I don't think the Tests.test_file_avif.TestAvifLeaks test failure on 3.15t is related to this patch 😅