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@Dandandan Dandandan commented May 10, 2021

Which issue does this PR close?

Closes #280

Rationale for this change

>2x speed up for common case (non-null indices) when using TakeOptions {check_bounds: true}

take check bounds i32 512                        
                        time:   [618.35 ns 619.16 ns 620.08 ns]
                        change: [-55.905% -55.474% -55.115%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 5 outliers among 100 measurements (5.00%)
  5 (5.00%) high mild

Benchmarking take check bounds i32 1024: Collecting 100 samples in estimated 5.0026 s (4.7M iteratio                                                                                                    take check bounds i32 1024                        
                        time:   [1.0389 us 1.0409 us 1.0430 us]
                        change: [-57.474% -57.278% -57.093%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 3 outliers among 100 measurements (3.00%)
  2 (2.00%) high mild
  1 (1.00%) high severe

What changes are included in this PR?

Speed up kernel with bound checking option on.

Are there any user-facing changes?

No

@Dandandan
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FYI @jorgecarleitao

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@nevi-me nevi-me left a comment

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nice catch!

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@jorgecarleitao jorgecarleitao left a comment

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LGTM :)

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Improve performance of bound checking option

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