On Saturday, 14 October 2017 at 04:36:25 UTC, Saurabh Das wrote:
On Wednesday, 11 October 2017 at 08:11:37 UTC, Jonathan M Davis
wrote:
On Wednesday, October 11, 2017 06:25:19 Dhananjay via
Digitalmars-d-learn wrote:
Hello,
I am upgrading to DMD 2.076.1 from DMD 2.069.2 (similar
results on 2.075.1), and seeing a huge increase in unittest
compilation time when the -deps parameter is also passed to
dmd. This is on both OSX and linux. What can be the cause of
this?
Well, that's a pretty big version jump. So, a lot could have
changed. One thing that comes to mind would be that imports
were overhauled pretty thoroughly to try and fix various
import bugs. This blog article talks about some of that:
http://www.schveiguy.com/blog/2016/03/import-changes-in-d-2-071/
Or the change could be the result of something else entirely.
Figuring it out would likely require doing a fair bit of
debugging to narrow down when the change happened (and that's
assuming that it's caused by a single commit or small set of
commits rather than simply getting worse over time due to a
variety of factors).
- Jonathan M Davis
The following observations (for the above test program) were
recorded on Mac OS X 10.11.6:
DMD64 D Compiler v2.073.1
real 0m0.091s
user 0m0.067s
sys 0m0.020s
DMD64 D Compiler v2.074.0
real 0m0.105s
user 0m0.072s
sys 0m0.022s
DMD64 D Compiler v2.075.1
real 0m44.932s
user 0m35.732s
sys 0m7.098s
DMD64 D Compiler v2.076.1
real 0m46.833s
user 0m37.827s
sys 0m7.254s
Furthermore, 2.075.1 gave a bunch of deprecation warnings in
std/string.d. The -de switch had to be removed before running.
Hope this helps,
Saurabh
I can reproduce on linux/x64, looks like a memory leak, as dmd
balloons out to eat up all available memory until it's killed. I
see it with this minimal command passed to dmd 2.075.1, but not
the 2.074.1 frontend, as reported:
./dmd2/linux/bin64/dmd -c -o- foo.d -unittest -deps=foo.deps
The closest issue I was able to find in bugzilla is this one, but
that says it goes away with -o-, not the case here:
https://issues.dlang.org/show_bug.cgi?id=17601
I suggest one of you file a bug with the minimal command, noting
that it goes away if -unittest or -deps is not passed. Make sure
you mark it as a regression, just like the above bug, as Walter
pays special attention to those.
