[Solved] Compilation Time

[loaded]

Hi All,
When we run the project with F9-Run, can we see the related compilation time in milliseconds in the messages section ?

[jamie]

And so what's the issue ?

F9 is recompiling before executing.

[loaded]

jamie, actually it's okay;
I wondered how the operating system I use, the disk type SSDs, and the different project options on different computers will affect the compilation and running speed of the program.

[MarkMLl]

I think it's a fair question, but I suggest that it would be better considered in the context of the FPC compiler. If that starts to emit timing information then the Lazarus IDE could be tweaked to display it.

Once it's looked at as an FPC problem... you don't say what OS you habitually run, but if it were a derivative of unix I'd expect the  time  command to be available.

I habitually append the time (rather than elapsed time) of my compilations to the output, since I'm approaching "silly old fool" stage and appreciate the reminder that I did in fact rebuild 30 seconds ago so I don't need to do so again; that can be done using Project Options -> Compiler Commands -> Execute After.

I don't know whether you could put something to generated elapsed timed in Tools -> Options -> Compiler executable, but I think you've just volunteered to experiment :-)

MarkMLl

[Martin_fr]

When we run the project with F9-Run, can we see the related compilation time in milliseconds in the messages section ?

Tools > Options > Environment > Messages Window: "Show FPC message lines compiled"
This includes the time, but not in millisecs, just 1 decimal after the seconds.

You can build the IDE with console.
- On Linux that is default, just start the IDE from a terminal.
- On Window: -WC
The output on the console: " compiler time in s: 4.855000320822"
(Note the console time may be bigger, as it includes launching fpc, and maybe other work)

For smaller projects there aren't too many options to speed up.
Obviously:
- disk speed.
- CPU: IPC for single core.

If you only compile the project, then there is little use of multicore. The IDE while waiting for fpc may use a diff core, but that makes no big diff.

If you have many packages, and the packages do NOT depend on each other, then packages can be compiled in parallel.
That is for example noticeable when you compile the IDE. (You can limit the threads in the options and compare)

[loaded]

I am grateful to MarkMLl and Martin_fr for your answers.

Tools > Options > Environment > Messages Window: "Show FPC message lines compiled"

Your answer was what I was looking for.