Also, the design goal of ninja was to build things "as fast as
possible". And when "convenience and speed are in conflict, prefer speed."
Although I can't totally disagree with Loadens comment to keep it simple
and your comment that the speed is reasonable now.
Op 24-9-2012 18:06, Wouter van Kleunen schreef:
No, ninja is not really slow. Only when the filesystem caches are
cold, a no-op build does take a considerable time. So yeah, the
performance difference will not be very big when the caches are hot.
Wouter
Op 24-9-2012 11:17, Peter Kümmel schreef:
On 24.09.2012 11:04, Nils Gladitz wrote:
When I tried with one of my larger projects the first no-op build after
a full build took something between 20 and 30 seconds but no-op builds
after that were below a second.
I'm not really sure what would cause this (I guess disk or filesystem
caching?).
Yes, ninja needs to read a lot of files to check dependencies.
Nils
On 09/24/2012 10:42 AM, Peter Kümmel wrote:
On 23.09.2012 15:04, Wouter van Kleunen wrote:
I had the following idea to speed up the building even more, if a
tool
can be build in ninja to list all files that need to be stat when
building a project. These files can be monitored by qtcreator and
later
be provided as input again to ninja. So my idea works as follows:
1. Build project using cmake + ninja
2. Get file list of all dependencies by using ninja (something like
ninja -t deplist).
3. Monitor the files using qt creator + qfilesystemwatcher
When the user requests a rebuild:
4. Execute a ninja build command + provide the list of changed files.
This way ninja won't have to stat any file.
5. Ninja builds
Is this feasible ?
I assume Qt Creator does it this way for qbs.
But for ninja this would be too much work.
You think even ninja is too slow?
Peter
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