Fast vectorized conversion from RGB to BGRA

Question

In a follow-up to some previous questions on converting RGB to RGBA, and ARGB to BGR, I would like to speed up a RGB to BGRA conversion with SSE

Answer 1

Ummm... using vImageConvert_RGB888toARGB8888 is VERY VERY fast (15X speedup).

Above PixelFix code (≈6ms per image, now on newer hardware)

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1. 6.373520 ms
2. 6.383363 ms
3. 6.413560 ms
4. 6.278606 ms
5. 6.293607 ms
6. 6.368118 ms
7. 6.338904 ms
8. 6.389385 ms
9. 6.365495 ms

Using vImageConvert_RGB888toARGB888, threaded (on newer hardware)

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1. 0.563649 ms
2. 0.400387 ms
3. 0.375198 ms
4. 0.360898 ms
5. 0.391278 ms
6. 0.396797 ms
7. 0.405534 ms
8. 0.386495 ms
9. 0.367621 ms

Need I say more?