评论放慢R吗？

Question

评论放慢了R吗？

关于python,StackOverflow上已经问了两次这个问题:

评论会减慢解释语言的速度吗？ 过度评论代码会减慢执行速度吗？

因为python答案似乎是'不'.我不太了解两种语言之间的差异,无法知道这些答案的相关性R.

这是一个关于白色空间的类似问题R.答案似乎是'不'.

白色空间会减慢处理速度

Answer 1

对于 R，答案似乎是“是”，除非我在下面的某个地方犯了错误。

# Time difference of 21.84725 secs
# Time difference of 24.05738 secs

# total.time.2 - total.time.1
#
# Time difference of 2.210126 secs

n <- 280

start.time.1 <- Sys.time()

b <- 2

for(i in 1:n) {
     for(j in 1:n) {
          for(k in 1:n) {

               b <- b + 2 - 1 - 0.75

          }
     }
}

b

end.time.1 <- Sys.time()

total.time.1 <- end.time.1 - start.time.1
total.time.1


start.time.2 <- Sys.time()

b <- 2

# I wonder whether comments slow down R.  Here are some comments.  Let's see.
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# I wonder whether comments slow down R.  Here are some comments.  Let's see.


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          for(k in 1:n) {

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# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.

               b <- b + 2 - 1 - 0.75

# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.
# I wonder whether comments slow down R.  Here are some comments.  Let's see.

          }
     }
}

b

end.time.2 <- Sys.time()

total.time.2 <- end.time.2 - start.time.2

total.time.1
total.time.2

total.time.2 - total.time.1