Andrew Jeffery
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db51375bb7
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genann: Optionally resolve activation functions at link time
Shave around 94 million instructions and 10 million branches off of execution
trace of example4 if the sigmoid activation function is resolved at link-time.
Before (`make`):
```
Performance counter stats for './example4':
98.988806 task-clock (msec) # 0.998 CPUs utilized
1 context-switches # 0.010 K/sec
0 cpu-migrations # 0.000 K/sec
79 page-faults # 0.798 K/sec
312,298,260 cycles # 3.155 GHz
1,094,183,752 instructions # 3.50 insn per cycle
212,007,732 branches # 2141.734 M/sec
62,774 branch-misses # 0.03% of all branches
0.099228100 seconds time elapsed
```
After:
`make`:
```
Performance counter stats for './example4':
97.335180 task-clock (msec) # 0.998 CPUs utilized
0 context-switches # 0.000 K/sec
0 cpu-migrations # 0.000 K/sec
82 page-faults # 0.842 K/sec
306,722,357 cycles # 3.151 GHz
1,065,669,644 instructions # 3.47 insn per cycle
214,256,601 branches # 2201.225 M/sec
60,154 branch-misses # 0.03% of all branches
0.097577079 seconds time elapsed
```
`make sigmoid`:
```
Performance counter stats for './example4':
92.629610 task-clock (msec) # 0.997 CPUs utilized
0 context-switches # 0.000 K/sec
0 cpu-migrations # 0.000 K/sec
78 page-faults # 0.842 K/sec
291,863,801 cycles # 3.151 GHz
1,000,931,204 instructions # 3.43 insn per cycle
202,465,800 branches # 2185.757 M/sec
50,949 branch-misses # 0.03% of all branches
0.092889789 seconds time elapsed
```
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
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2017-12-18 22:36:44 +10:30 |
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