Menu
Do comments slow down R?
This question has been asked twice on StackOverflow regarding python:
Do comments slow down an interpreted language? Will excessive commenting of code slow execution?
For python the answer appears to be 'no'. I do not know enough about the differences between the two languages to know how relevant those answers are for R.
Here is a similar question about white space in R. Again the answer appears to be 'no'.
does white space slow down processing
330
Commenting will not affect the script execution time in normal case. But the number of lines you write in your code affect the parser to read and buffer it considerably.
No it does not effect performance. As most of the programming languages compile or interpret code and comments are skipped as computer has nothing to do with comments.
Since comments have no impact on the runtime results, they are sometimes neglected when the source code is updated. Source code maintenance as a result of a production bug is often done under time pressure and maintaining comments is seen as an unnecessary delay.
So just wanted to know whether keeping that code inside my java file affect the size of the compiled class file? No, Commented code is not part of class file. But, if you are using version-control system, you should remove the comments also to enhance readability and maintainability.
For R the answer appears to be 'yes', unless I made a mistake somewhere below.
# 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
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With