擅长:python、mysql、java
<p>有些令人惊讶的是,使用<code>.values</code>数组而不是<code>Series</code>对我来说要快得多:</p>
<pre><code>>>> time df = mul_df(3000, 2000, 3).reset_index()
CPU times: user 5.96 s, sys: 0.81 s, total: 6.78 s
Wall time: 6.78 s
>>> timeit df[df["STK_ID"] == "A0003"]
1 loops, best of 3: 841 ms per loop
>>> timeit df[df["STK_ID"].values == "A0003"]
1 loops, best of 3: 210 ms per loop
</code></pre>