（２順目）
レシピ5.2
x, y, z = np.random.rand(3, 1000000)
print(x)
print(y)
print(z)
print(x.shape)
print(y.shape)
print(z.shape)
[ 0.02446522 0.53300813 0.08588861 ..., 0.51124115 0.99969485 0.431258 ]
[ 0.93027085 0.71045152 0.23566422 ..., 0.30943928 0.61953679
0.41338103]
[ 0.724853 0.86620411 0.93741716 ..., 0.72326703 0.27723427
0.45690644]
(1000000,)
(1000000,)
(1000000,)
3項の結果
100 loops, best of 3: 17.7 ms per loop
4項の結果
The slowest run took 5.86 times longer than the fastest. This could mean that an intermediate result is being cached
100 loops, best of 3: 2.8 ms per loop
17.7/2.8=6.3倍
5項 スレッドを20まで拡大してみた
1 thread
100 loops, best of 3: 5.63 ms per loop
2 thread
100 loops, best of 3: 3.67 ms per loop
3 thread
100 loops, best of 3: 3.02 ms per loop
4 thread
100 loops, best of 3: 2.92 ms per loop
5 thread
100 loops, best of 3: 2.86 ms per loop
6 thread
100 loops, best of 3: 2.82 ms per loop
7 thread
100 loops, best of 3: 2.8 ms per loop
8 thread
100 loops, best of 3: 2.8 ms per loop
9 thread
100 loops, best of 3: 2.79 ms per loop
10 thread
100 loops, best of 3: 2.79 ms per loop
11 thread
100 loops, best of 3: 2.81 ms per loop
12 thread
100 loops, best of 3: 2.82 ms per loop
13 thread
100 loops, best of 3: 2.81 ms per loop
14 thread
100 loops, best of 3: 2.81 ms per loop
15 thread
100 loops, best of 3: 2.82 ms per loop
16 thread
100 loops, best of 3: 2.81 ms per loop
17 thread
100 loops, best of 3: 2.83 ms per loop
18 thread
100 loops, best of 3: 2.82 ms per loop
19 thread
100 loops, best of 3: 2.82 ms per loop
20 thread
100 loops, best of 3: 2.84 ms per loop
むやみにスレッドを増やしても効果がない。
レシピ5.3
Cコンパイラが動作しないのであきらめる
