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Hot Topic (More than 8 Replies) Compile Time (Read 4847 times)
davidcoward
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Compile Time
Feb 16th, 2018 at 4:21am
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Hi All

Are there options which I can fiddle with to reduce the compile time?

Right now, if I re-open a project and make a small adjustment (no new libraries), the compile process goes back to searching for and compiling libraries and the compile takes pretty close to 6 (six) minutes.

Then, if I undo and redo the change, the compile takes about 13 seconds.

I don't have any real time virus scanning stuff.

It's in Visual Studio. It's an i7.

Thanks

David

  
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Tim@Visual Micro
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Re: Compile Time
Reply #1 - Feb 16th, 2018 at 5:09pm
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All boards have different tool chains and build properties so always attach a verbose output so we can see what you are using.

I also suggest you attach a verbose output with slow and fast compile times so we can see what is happening.
  
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davidcoward
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Re: Compile Time
Reply #2 - Feb 16th, 2018 at 9:04pm
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Thanks, Tim

I experimented a bit and removing "Deep Search Includes" reduced the time to a more respectable 90 seconds.

It's building for a Teensy.

David
  
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Tim@Visual Micro
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Re: Compile Time
Reply #3 - Feb 16th, 2018 at 9:59pm
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Great but it would still be useful to see where the tool chain is slow. Paul at teensy might be able to sort it. It used to be very fast.

1)

I tested with "vMicro>Compiler>High Speed Parallel Builds" enabled.

Full compile empty project (empty setup() and loop() was 34 seconds. Without deep search was 24 secs

2nd compile was .46 secs in release mode and 3 secs in debug mode.

Adding a method such as void test(){} to the .ino and recompiling varied between 1.5 secs and 3 secs depending upon deep search.

2)

With "vMicro>Compiler>High Speed Parallel Builds" OFF a full compile / rebuild of the empty project is 60 seconds

3)

The build output I have mentioned previously shows you when files are compiled and when cache is used. Other than give you some bench marks for the Teensy tool chain I can't help further without that info.
  
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davidcoward
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Re: Compile Time
Reply #4 - Feb 16th, 2018 at 11:31pm
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Thanks Tim

I have the files, but don't have permission to post them...

David
  
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Tim@Visual Micro
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Re: Compile Time
Reply #5 - Feb 17th, 2018 at 12:12am
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is there an Update Session tab at the top of the screen?
  
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davidcoward
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Re: Compile Time
Reply #6 - Feb 17th, 2018 at 1:37am
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Here we go
  
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Tim@Visual Micro
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Re: Compile Time
Reply #7 - Feb 17th, 2018 at 12:43pm
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Okay so your 90 secs does not have fast builds enabled and is building the entire core.

Can you explain what code file you modify for the 90 second build kicks in?
  
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davidcoward
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Re: Compile Time
Reply #8 - Feb 17th, 2018 at 4:36pm
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For example, a value of a constant in the main .ino.

It seems to do that every time I reload the project into VS, make the simple mod, then build it. After that, it is OK, more or less.

The time is expended searching for and building libraries (even though these have not changed), then building the core. After that, building the project code is pretty quick. I don't know what "Deep Search Includes" does, but unchecking that seems to have made most difference. 


  
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Tim@Visual Micro
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Re: Compile Time
Reply #9 - Feb 17th, 2018 at 5:16pm
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Can you please confirm if you have high speed parallel build enabled?
  
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davidcoward
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Re: Compile Time
Reply #10 - Feb 17th, 2018 at 5:41pm
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Yes, I do now have Parallel Build enabled.
  
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Tim@Visual Micro
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Re: Compile Time
Reply #11 - Feb 17th, 2018 at 5:48pm
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Great now if you click build>rebuild what is the compile time?

when we confirm the correct timing we can then investigate if you have disabled caching of core or libs etc.
« Last Edit: Feb 18th, 2018 at 9:04pm by Tim@Visual Micro »  
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