www.digitalmars.com         C & C++   DMDScript  

digitalmars.D.learn - Large binary size using std.regex

reply "Bayan Rafeh" <bayan.rafeh92 gmail.com> writes:
Compiling a simple program using std.regex:

import std.regex;
import std.stdio;

void main(string[] args) {
    auto re = regex(args[1], "g");
    foreach(line; stdin.byLine)
        if(line.match(re))
            writeln(line);
}


Renders a 1.6 megabyte binary. Is that normal?
Aug 23 2014
next sibling parent reply ketmar via Digitalmars-d-learn <digitalmars-d-learn puremagic.com> writes:
On Sat, 23 Aug 2014 23:40:12 +0000
Bayan Rafeh via Digitalmars-d-learn <digitalmars-d-learn puremagic.com>
wrote:


 Renders a 1.6 megabyte binary. Is that normal?


yes. this binary includes statically linked runtime and phobos, plus
alot of template expansions. alas, template magic is not free.
Aug 23 2014
parent reply "Artem Tarasov" <lomereiter gmail.com> writes:
On Sunday, 24 August 2014 at 03:14:33 UTC, ketmar via 
Digitalmars-d-learn wrote:

 yes. this binary includes statically linked runtime and phobos, 
 plus
 alot of template expansions. alas, template magic is not free.


OTOH, on Linux latest LDC does far better job in eliminating dead 
code than DMD:
$ ldc2 -O -release test.d && ls -l test | cut -f 5- -d ' '
712522 Aug 24 10:07 test
$ dmd -O -release -noboundscheck test.d && ls -l test | cut -f 5- 
-d ' '
1892622 Aug 24 10:07 test

Which means there's plenty of unfulfilled potential.
Aug 23 2014
parent reply ketmar via Digitalmars-d-learn <digitalmars-d-learn puremagic.com> writes:
On Sun, 24 Aug 2014 06:10:20 +0000
Artem Tarasov via Digitalmars-d-learn
<digitalmars-d-learn puremagic.com> wrote:


 OTOH, on Linux latest LDC does far better job in eliminating dead=20
 code than DMD:


does ldc uses shared runtime here? with

  dmd -defaultlib=3Dlibphobos2.so test.d

i got 657,438 bytes (425,836 stripped).

seems that your ldc uses shared runtime.
Aug 23 2014
parent reply "Artem Tarasov" <lomereiter gmail.com> writes:
On Sunday, 24 August 2014 at 06:20:38 UTC, ketmar via 
Digitalmars-d-learn wrote:

 does ldc uses shared runtime here?


No, it doesn't:
$ ldd test
	linux-vdso.so.1 (0x00007fffce266000)
	librt.so.1 => /usr/lib/librt.so.1 (0x00007fc174193000)
	libdl.so.2 => /usr/lib/libdl.so.2 (0x00007fc173f8f000)
	libpthread.so.0 => /usr/lib/libpthread.so.0 (0x00007fc173d71000)
	libm.so.6 => /usr/lib/libm.so.6 (0x00007fc173a6d000)
	libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x00007fc173857000)
	libc.so.6 => /usr/lib/libc.so.6 (0x00007fc1734a9000)
	/lib64/ld-linux-x86-64.so.2 (0x00007fc17439b000)
Aug 23 2014
parent ketmar via Digitalmars-d-learn <digitalmars-d-learn puremagic.com> writes:
On Sun, 24 Aug 2014 06:36:01 +0000
Artem Tarasov via Digitalmars-d-learn
<digitalmars-d-learn puremagic.com> wrote:


 On Sunday, 24 August 2014 at 06:20:38 UTC, ketmar via=20
 Digitalmars-d-learn wrote:

 does ldc uses shared runtime here?


 No, it doesn't:


hm. ldc rocks. ;-)
Aug 23 2014
prev sibling parent ketmar via Digitalmars-d-learn <digitalmars-d-learn puremagic.com> writes:
On Sat, 23 Aug 2014 23:40:12 +0000
Bayan Rafeh via Digitalmars-d-learn <digitalmars-d-learn puremagic.com>
wrote:

p.s. strip it. stripping debug info can significantly reduce binary
size. for your example:

unstripped elf: 1,674,653 bytes
stripped elf  : 1,074,528 bytes
Aug 23 2014