[英]Faster float to int conversion in Python
Here's a piece of code that takes most time in my program, according to timeit statistics. 根据timeit统计,这是一段代码,该代码在我的程序中耗时最多。 It's a dirty function to convert floats in [-1.0, 1.0] interval into unsigned integer [0, 2**32].
将[-1.0,1.0]间隔中的浮点数转换为无符号整数[0,2 ** 32]是一个肮脏的函数。 How can I accelerate
floatToInt
? 如何加速
floatToInt
?
piece = []
rng = range(32)
for i in rng:
piece.append(1.0/2**i)
def floatToInt(x):
n = x + 1.0
res = 0
for i in rng:
if n >= piece[i]:
res += 2**(31-i)
n -= piece[i]
return res
Did you try the obvious one? 您尝试过显而易见的吗?
def floatToInt(x):
return int((x+1.0) * (2**31))
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.