[cmake-developers] cmake install command expected performance?

[Robert Goulet]

We deleted the destination folder every time we did a test. And it's an SSD drive, I don't think having files in cache would be the issue. When files are already there it still takes 30+ seconds for cmake to "not" copy the files.

-----Original Message-----
From: Nils Gladitz [mailto:nilsgladitz at gmail.com] 
Sent: Monday, February 23, 2015 10:37 AM
To: Robert Goulet; cmake-developers at cmake.org
Subject: Re: [cmake-developers] cmake install command expected performance?

On 02/23/2015 04:13 PM, Robert Goulet wrote:
> I'm running into an issue were using the CMake install command to copy 
> a directory with over 5000+ files (slightly over 1GB of data) takes a 
> lot more time than doing a simple copy. On an SSD drive it takes 0.2 
> seconds to copy, while it takes about 56+ seconds for CMake to do the 
> same thing using the install command. Why is there so much a big 
> difference? Is this intended for some reasons or could there be a bug? Thanks!

Did you run the manual copy right after the cmake install? (e.g. could files still have been in the system's disk cache?).

Both a manual copy and a cmake install might omit copying if the source isn't newer than the destination file; did you perform both with the destination files missing?

Nils