test: Adapt benchmarks to use `codspeed`

[DeaMariaLeon]

What type of PR is this? (check all applicable)

• [ ] 💾 Refactor
• [ ] 🪄 Feature
• [ ] 🐞 Bug Fix
• [ ] 🔧 Optimization
• [ ] 📚 Documentation
• [x] 🧪 Test
• [ ] 🛠️ Other

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Checklist

• [x] Code follows style guide
• [x] Tests added
• [ ] Documented the changes

---

Please explain your changes below.

Adapted benchmarks from original file benchmark_coo.py that was used to benchmark with asv. Now benchmarking with codspeed.

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #741 will not alter performance

_{Comparing DeaMariaLeon:bench2 (5c34b67) with main (0612373)}

Summary

✅ 14 untouched benchmarks

🆕 14 new benchmarks

Benchmarks breakdown

	Benchmark	main	DeaMariaLeon:bench2	Change
🆕	test_elemwise_broadcast[side=100-add]	N/A	14 ms	N/A
🆕	test_elemwise_broadcast[side=100-mul]	N/A	3.1 ms	N/A
🆕	test_elemwise_broadcast[side=1000-add]	N/A	14.9 s	N/A
🆕	test_elemwise_broadcast[side=1000-mul]	N/A	73.5 ms	N/A
🆕	test_elemwise_broadcast[side=500-add]	N/A	1.7 s	N/A
🆕	test_elemwise_broadcast[side=500-mul]	N/A	12.5 ms	N/A
🆕	test_index_fancy[side=100]	N/A	3.5 ms	N/A
🆕	test_index_scalar[side=100]	N/A	481.2 µs	N/A
🆕	test_index_slice2[side=100]	N/A	1.6 ms	N/A
🆕	test_index_slice3[side=100]	N/A	1.4 ms	N/A
🆕	test_index_slice[side=100]	N/A	1.1 ms	N/A
🆕	test_matmul[side=1000]	N/A	39.9 ms	N/A
🆕	test_matmul[side=100]	N/A	2.7 ms	N/A
🆕	test_matmul[side=500]	N/A	8 ms	N/A

[DeaMariaLeon]

@hameerabbasi Regarding:

SEED = 42 I'd import this from a central place, so it can be changed just once.

It's not working the way I did it on this commit. But locally I did something else: I put them inside a conftest.py. Which it seems to work, except that I noticed that SEED and DENSITY vary on other files. Like elemwise_example.py, matmul_example.py, etc.

[hameerabbasi]

For seed, let's unify it. For density, we can leave it constant in each file where it's constant; and change it where it should be changed.

[DeaMariaLeon]

For seed, let's unify it.

What does this mean? set just one value for all the tests, on all the files? Set the value on conftest.py?

[hameerabbasi]

Set the value on conftest.py?

Set one value for everything in some central place.

[DeaMariaLeon]

I'll do the out-of-band changes on another PR if that's fine with you then.