请评论减慢R？
请评论减慢R ？
这个问题已经在StackOverflow上关于python两次提出：
评论是否会减慢解释型语言？ 代码的过度评论会减慢执行速度吗？
对于python ，答案似乎是“否”。 我对这两种语言之间的差异了解不多，不知道这些答案与R有多相关。
这里是关于R空白的类似问题。 答案似乎是'不'。
白色空间减慢处理
对于R来说，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.
# 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.
for(i in 1:n) {
# 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.
# I wonder whether comments slow down R. Here are some comments. Let's see.
for(j in 1:n) {
# 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.
for(k in 1:n) {
# 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 <- 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