Show HN: Tiny 1k Rust binary on Windows

Post by zamadatix » Tue, Dec 01, 2020, 3:09 PM UTC

slezyr wrote: post #16

pantalaimon wrote: post #13

I'm disappointed. In C I can get a 1k Hello Word binary simply be writing int main(void) { puts("Hello World!"); return 0; } The Rust version is a mess [0] [0] https://github.com/mcountryman/min-sized-rust-windows/blob/m...

You're comparing C+StdLib vs. Rust without StdLib. Disable stdlib for C version and use the following program: #include int _start() { const char str[] = "Hello world!\n"; HANDLE stdout = GetStdHandle(STD_OUTPUT_HANDLE); DWORD written; WriteFile(stdout, str, sizeof(str), &written, NULL); ExitProcess(12); return 0; } https://stackoverflow.com/a/42536990 Which is similar to what the Rust program does. The result should…

Post by mcountryman » Tue, Dec 01, 2020, 3:43 PM UTC

acqq wrote: post #22

winter_blue wrote: post #18

Zig actually does a good job of cutting final output bytes automatically , even with standard library use. I think (?) its compiler sort-of implements a more advanced version of Unix strip. Andrew Kelley could probably chime in more on it.

It's very easy and fast to try: using 0.7.0+51d7c14ce from https://ziglang.org/download/ and: const std = @import("std"); pub fn main() void { std.debug.print("Hello, world!\n", .{}); } ---------- zig build-exe hello.zig -O ReleaseSmall --strip --single-threaded -target x86_64-windows Resulting hello.exe is 3072 bytes. From these 2560 are zero bytes . The only system calls from the resulting binary are to ExitProcess…

Post by ChrisSD » Tue, Dec 01, 2020, 4:03 PM UTC

pantalaimon wrote: post #13

I'm disappointed. In C I can get a 1k Hello Word binary simply be writing int main(void) { puts("Hello World!"); return 0; } The Rust version is a mess [0] [0] https://github.com/mcountryman/min-sized-rust-windows/blob/m...

    #include 
    
    int main(void) {
        puts("Hello World!");
        return 0;
    }

   cl small.c /MD

Post by ChrisSD » Tue, Dec 01, 2020, 4:18 PM UTC

slezyr wrote: post #16

pantalaimon wrote: post #13

I'm disappointed. In C I can get a 1k Hello Word binary simply be writing int main(void) { puts("Hello World!"); return 0; } The Rust version is a mess [0] [0] https://github.com/mcountryman/min-sized-rust-windows/blob/m...

You're comparing C+StdLib vs. Rust without StdLib. Disable stdlib for C version and use the following program: #include int _start() { const char str[] = "Hello world!\n"; HANDLE stdout = GetStdHandle(STD_OUTPUT_HANDLE); DWORD written; WriteFile(stdout, str, sizeof(str), &written, NULL); ExitProcess(12); return 0; } https://stackoverflow.com/a/42536990 Which is similar to what the Rust program does. The result should…

    cl small2.c /MD /link /entry:_start /subsystem:CONSOLE kernel32.lib

Post by pantalaimon » Tue, Dec 01, 2020, 4:50 PM UTC

mythz wrote: post #27

pantalaimon wrote: post #13

I'm disappointed. In C I can get a 1k Hello Word binary simply be writing int main(void) { puts("Hello World!"); return 0; } The Rust version is a mess [0] [0] https://github.com/mcountryman/min-sized-rust-windows/blob/m...

The smallest executable gcc (on Ubuntu) compiles that to is 8296 bytes (tried every -O optimization).

   text    data     bss     dec     hex filename
   1566     600       8    2174     87e hello