building palemoon,

[frostknight]

Two questions come to mind,

Is there a way to make it build with avx2 support instead of avx or sse4 or w/e
something like this?

ac_add_options --enable-avx2

Also, would avx2 speed up my browser? Just asking and if so, by how much?

[Moonchild]

1. Build with --enable-optimize="-O2b1 -GTs -GS- -arch:AVX2 -Qspectre -utf-8"

2. would avx2 speed up my browser? Just asking and if so, by how much?

   It would. By how much is difficult to answer. YMMV; you may not notice or you may notice. Our code base is so large and complex it's not possible to predict what the tangible effect will be at the end of the pipeline, if any.

[jobbautista9]

For building with GCC (Moonchild's instructions is for the MSVC compiler on Windows), use the following optimization settings (courtesy of Nuck-TH's mozconfig for his AVX2 builds):

Code: Select all

ac_add_options --enable-optimize="-O2 -march=x86-64-v3 -w"

[frostknight]

For building with GCC (Moonchild's instructions is for the MSVC compiler on Windows), use the following optimization settings (courtesy of Nuck-TH's mozconfig for his AVX2 builds):

Code: Select all

ac_add_options --enable-optimize="-O2 -march=x86-64-v3 -w"

How peculiar, it gave me errors when I tried that.

0:04.51 DEBUG: configure: failed program was:
0:04.51 DEBUG: #line 12920 "configure"
0:04.51 DEBUG: #include "confdefs.h"
0:04.51 DEBUG: #include <stdio.h>
0:04.51 DEBUG: int main() {
0:04.51 DEBUG: printf("Hello World\n");
0:04.51 DEBUG: ; return 0; }
0:04.51 DEBUG: configure: error: These compiler flags for C are invalid: -O2 -march=x86-64-v3 -w
0:04.51 ERROR: old-configure failed
0:04.53 *** Fix above errors and then restart with\
0:04.53 "/usr/bin/make -f client.mk build"
0:04.53 make[2]: *** [/home/user/Pale-Moon/client.mk:370: configure] Error 1
0:04.53 make[1]: *** [/home/user/Pale-Moon/client.mk:383: /home/user/Pale-Moon/obj-x86_64-pc-linux-gnu/config.status] Error 2
0:04.53 make: *** [client.mk:164: build] Error 2
0:04.58 0 compiler warnings present.

However, above that I saw the option of core-avx2 to add in place of x86-64-v3