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# Debug version matrix.c
-This matrix.c is quantum/matrix.c with the following additions:
+This matrix.c is 0.13.19:quantum/matrix.c with the following additions:
* Added the MATRIX_DEBUG_SCAN_{START/END} macro to measure the execution time of matrix_scan().
* Added the MATRIX_DEBUG_DELAY_{START/END} macro to measure delay time.
* Added the MATRIX_MUL_SELECT handling for symmetric70_proto.
+## Current performance
+
+ | MCU | delay type | execution time <br> of <br> `matrix_scan()` | matrix scan rate |
+ |-------------------|---------------|------------|----------------|
+ | Pro Micro (16MHz) | default | 503us | 1810 scans/sec |
+ | Pro Micro (16MHz) | adaptive | 383us | 2320 scans/sec |
+ | Pro Micro (16MHz) | fast adaptive | 382us | 2330 scans/sec |
+ | Proton C (72MHz) | default | 210us | 4350 scans/sec |
+ | Proton C (72MHz) | adaptive | 76.4us | 10600 scans/sec |
+ | Proton C (72MHz) | fast adaptive | 75.6us | 10800 scans/sec |
+
## Compile
* Set MATRIX_IO_DELAY value