bs4 的select 和find_all方法效率对比

select方法能用css选择器，非常友好，于是想对比一下是否效率上更优秀

 

s1=time.time()

star=[x.text for x in bs_info.find_all('span',{'class':'rating_num'})]

e1 = time.time()

print(e1-s1)

s2 = time.time()

star = [x.text for x in bs_info.select('body span.rating_num')]

e2 = time.time()

print(e2 - s2)

exit()

 

可见find_all速度比select快了1倍