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digitalmars.D.learn - DerelictGL3 slow compilation speed with contexts

reply Igor <stojkovic.igor gmail.com> writes:
Hi All,

I switched from using free functions in DerelictGL3 to 
DerelictGL3_Contexts and compilation speed in optimized build 
using DMD went from 2 seconds to 7 minutes and using LDC from 2 
seconds to 10 seconds. Is this a known problem? Are there any 
workarounds?
Sep 12 2017
parent reply Mike Parker <aldacron gmail.com> writes:
On Tuesday, 12 September 2017 at 21:55:23 UTC, Igor wrote:

 Hi All,

 I switched from using free functions in DerelictGL3 to 
 DerelictGL3_Contexts and compilation speed in optimized build 
 using DMD went from 2 seconds to 7 minutes and using LDC from 2 
 seconds to 10 seconds. Is this a known problem? Are there any 
 workarounds?


The support for contexts is still relatively new and I've 
received no feedback specific to it since I first released it in 
the 2.0 alpha. Given the heavy use of string & template mixins, 
it's possible I'm hitting a corner case somewhere. In my simple 
tests, I haven't seen it. So the only way I'm going to be able to 
narrow it down is with a minimal example that I can compile and 
test with. Is there anything you can give me?
Sep 12 2017
parent reply Igor <stojkovic.igor gmail.com> writes:
On Wednesday, 13 September 2017 at 01:30:10 UTC, Mike Parker 
wrote:

 On Tuesday, 12 September 2017 at 21:55:23 UTC, Igor wrote:

 Hi All,

 I switched from using free functions in DerelictGL3 to 
 DerelictGL3_Contexts and compilation speed in optimized build 
 using DMD went from 2 seconds to 7 minutes and using LDC from 
 2 seconds to 10 seconds. Is this a known problem? Are there 
 any workarounds?


 The support for contexts is still relatively new and I've 
 received no feedback specific to it since I first released it 
 in the 2.0 alpha. Given the heavy use of string & template 
 mixins, it's possible I'm hitting a corner case somewhere. In 
 my simple tests, I haven't seen it. So the only way I'm going 
 to be able to narrow it down is with a minimal example that I 
 can compile and test with. Is there anything you can give me?


Well since minimal example is a window app that opens a window,
sets everything up and calls opengl stuff I will just push it
to my github project this evening and you will can try with that.
I will let you know when its done.

In the meantime I can tell you that it seems that the main culprit
for long compile time is "-inline" compiler option.
Sep 13 2017
parent reply Mike Parker <aldacron gmail.com> writes:
On Wednesday, 13 September 2017 at 10:28:26 UTC, Igor wrote:


 Well since minimal example is a window app that opens a window,
 sets everything up and calls opengl stuff I will just push it
 to my github project this evening and you will can try with 
 that.
 I will let you know when its done.

 In the meantime I can tell you that it seems that the main 
 culprit
 for long compile time is "-inline" compiler option.


In that case, I should be able to reproduce it. I've not compiled 
the context stuff with -inline before. Once I do reproduce it, 
I'll open an issue over github for future discussion. I'll let 
you know if I need more info.
Sep 13 2017
parent reply Igor <stojkovic.igor gmail.com> writes:
On Wednesday, 13 September 2017 at 13:25:01 UTC, Mike Parker 
wrote:

 On Wednesday, 13 September 2017 at 10:28:26 UTC, Igor wrote:


 Well since minimal example is a window app that opens a window,
 sets everything up and calls opengl stuff I will just push it
 to my github project this evening and you will can try with 
 that.
 I will let you know when its done.

 In the meantime I can tell you that it seems that the main 
 culprit
 for long compile time is "-inline" compiler option.


 In that case, I should be able to reproduce it. I've not 
 compiled the context stuff with -inline before. Once I do 
 reproduce it, I'll open an issue over github for future 
 discussion. I'll let you know if I need more info.


I tested it again with my entire project and it seems it is not 
inline thing but -O (optimized build). You can checkout the 
project here: https://github.com/igor84/dngin

if you try to build it with "dub build -ax86_64 -b release" you 
will experience very long compilation.
Sep 13 2017
parent Mike Parker <aldacron gmail.com> writes:
On Wednesday, 13 September 2017 at 16:30:34 UTC, Igor wrote:


 I tested it again with my entire project and it seems it is not 
 inline thing but -O (optimized build). You can checkout the 
 project here: https://github.com/igor84/dngin

 if you try to build it with "dub build -ax86_64 -b release" you 
 will experience very long compilation.


So I was able to reproduce this with my test app. It's going to 
be a bear to debug. I'll devote some time to it this weekend and 
see where that gets me.

I've opened an issue for future discussion:

https://github.com/DerelictOrg/DerelictGL3/issues/58
Sep 14 2017