According to the readme, Rust is supported, did anyone tried and noticed improvement? rui314/mold: Mold: A Modern Linker 🦠 https://github.com/rui314/mold

  • MoSal@lemm.eeEnglish
    01·
    2 years ago

    codegen-units=1, debug=true, varying lto

    lto = "fat"

    Flags Clean build time Pre-strip size Post-strip size
    (default) 2:31 90.8207MiB 7.3374MiB
    ["-Z", "gcc-ld=lld"] 2:31 91.9731MiB 7.3332MiB
    linker = "clang" 2:32 90.8207MiB 7.3375MiB
    linker = "clang"; fuse-ld="mold" 2:31 92.1107MiB 7.3334MiB

    lto = "thin"

    Flags Clean build time Pre-strip size Post-strip size
    (default) 1:33 96.9630MiB 8.1695MiB
    ["-Z", "gcc-ld=lld"] 1:32 98.3889MiB 8.1777MiB
    linker = "clang" 1:33 96.9631MiB 8.1695MiB
    linker = "clang"; fuse-ld="mold" 1:32 98.6903MiB 8.1797MiB

    lto = false

    Flags Clean build time Pre-strip size Post-strip size
    (default) 1:32 113.5656MiB 8.0601MiB
    ["-Z", "gcc-ld=lld"] 1:30 115.1210MiB 8.1122MiB
    linker = "clang" 1:32 113.5656MiB 8.0602MiB
    linker = "clang"; fuse-ld="mold" 1:31 115.4679MiB 8.0663MiB

    lto = "off"

    Flags Clean build time Pre-strip size Post-strip size
    (default) 1:33 113.5666MiB 8.0601MiB
    ["-Z", "gcc-ld=lld"] 1:31 115.1231MiB 8.1122MiB
    linker = "clang" 1:32 113.5667MiB 8.0602MiB
    linker = "clang"; fuse-ld="mold" 1:31 115.4697MiB 8.0662MiB

    codegen-units=8, debug=true, varying lto

    lto = "fat"

    Flags Clean build time Pre-strip size Post-strip size
    (default) 2:21 104.9842MiB 7.6304MiB
    ["-Z", "gcc-ld=lld"] 2:19 106.1436MiB 7.6264MiB
    linker = "clang" 2:21 104.9882MiB 7.6344MiB
    linker = "clang"; fuse-ld="mold" 2:19 106.2864MiB 7.6325MiB

    lto = "thin"

    Flags Clean build time Pre-strip size Post-strip size
    (default) 1:12 134.1112MiB 9.0445MiB
    ["-Z", "gcc-ld=lld"] 1:09 136.1897MiB 9.0660MiB
    linker = "clang" 1:12 134.1113MiB 9.0446MiB
    linker = "clang"; fuse-ld="mold" 1:09 136.4466MiB 9.0494MiB

    lto = false

    Flags Clean build time Pre-strip size Post-strip size
    (default) 1:14 158.1049MiB 9.0328MiB
    ["-Z", "gcc-ld=lld"] 1:11 159.9998MiB 9.1129MiB
    linker = "clang" 1:14 158.1050MiB 9.0328MiB
    linker = "clang"; fuse-ld="mold" 1:12 160.3123MiB 9.0428MiB

    lto = "off"

    Flags Clean build time Pre-strip size Post-strip size
    (default) 0:57 145.9463MiB 9.4586MiB
    ["-Z", "gcc-ld=lld"] 0:54 148.6021MiB 9.6001MiB
    linker = "clang" 0:57 145.9464MiB 9.4587MiB
    linker = "clang"; fuse-ld="mold" 0:55 148.8842MiB 9.4668MiB

    mold appears to be similar but not faster than lld.

    With the caveat that this is not a proper benchmark since:

    • I didn’t measure link time alone.
    • I didn’t bother running each case multiple times picking the fastest run (since I perceived the differences to be insignificant).

    And a side note, lto = false appears to be practically useless.