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Table of Contents
Instruction timings
Here are some results of timings I've done of several instructions in C/C++, to compare several ways to do one thing.
Proceeding
Summary of results
All results
| Title | Code | Cyril_F | Cyril_P | cJ_F | cJ_P | Infomob | Almighty | PC104 |
|---|---|---|---|---|---|---|---|---|
| RGB → Y Conversion | ||||||||
| Float | imgg[k2++] = (0.299*img[k++] + 0.587*img[k++] + 0.114*img[k++]); | 175 | 6.09 ??! | 20.8 | 12.6 | 84.3 | ||
| Integer | imgg[k2++] = (19595*img[k++] + 38470*img[k++] + 7471*img[k++]) » 16; | 91.1 | 25.1 | 4.03 | 153 | |||
| Shift1 | imgg[k2++] = (img[k++]»2 + img[k]»1 + img[k++]»3 + img[k++]»3); | 50.4 | 10.6 | 5.97 | 29.3 | |||
| Shift2 | imgg[k2++] = (img[k]»2 + img[k++]»4 + img[k]»1 + img[k++]»4 + img[k++]»3); | 56.7 | 11.7 | 6.65 | 43.4 | |||
