V: Hello world compile time slow?

[simonhf]

V version:

$ ./v version
V 0.1.28 b58b159

OS:

$ uname -a
Linux ubuntu 5.3.0-61-generic #55-Ubuntu SMP Fri Jun 19 11:16:34 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

What did you do?

$ time ./v examples/hello_world.v 
real    0m0.612s

What did you expect to see?

$ cat foo.c
#include <stdio.h>

void main(void) {
        printf("hello world\n");
}
$ time gcc -o foo foo.c
real    0m0.033s

What did you see instead?

Is the 612ms compile time expected for the vlang hello world example?

I tried my own plain C hello world example and it only took 33ms... so nearly 20x faster. Or what am I doing wrong?

I saw this [1] as well, which seems quite a bit faster at 443ms but still not that fast, or? And mysteriously took only 177ms at the start of this year!

What type of compile times should I be expecting for a hello world program?

To put things into perspective, a Perl one-liner takes 2ms:

$ time perl -e 'printf qq[hello world\n]'
hello world
real    0m0.002s

Disclaimer: I'm a vlang newbie! :-)

[1] https://fast.vlang.io/

[LouisSchmieder]

the problem is we can just create an simple hello world C file, because we have modules which are included like the builtin module. For a simple hello world in V it's 9000 lines in C, but this will change maybe in future

[Delta456]

Modules aren't cached right now. They will be soon.

[medvednikov]

Yeah, that’s what I’m working on right now.

[simonhf]

Thanks for the replies! Is there a ticket I can watch, or associate with this ticket, to be notified when the feature is ready?

[Delta456]

@simonhf You can join the discord server which is given in the README.md of this repo.

[simonhf]

Had trouble finding the link in the README.md file or any other file referencing Discord, but Googling helped me find vlang on Discord and this [1] is the direct link to the #working-on-right-now section on vlang Discord, in case anybody else is interested in following along.
[1] https://discordapp.com/channels/592103645835821068/712739618788868236/732629803190190101

[JalonSolov]

Under the large button for github on the home page are a line of icons which are links to various social media. The left-most is a twitter icon, the 2nd from the left is for Discord.

[simonhf]

Ahh, thanks... I initially just searched the text on the page for 'discord' but that didn't match the icon... mystery solved! :-)

[JalonSolov]

Yeah... unless you recognize the icons immediately, you have to hover the mouse to see what they are. Not the best UI, but it seems to work most of the time.

[simonhf]

Yeah, thanks... I'm also a newbie to Discord so I didn't know what I was looking for :-)