Struct copy benchmark results

cargo-bench.log

     Running target\release\bench_yich-33238ad2a15cba57.exe

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured

     Running target\release\benches-a247be756fcf517f.exe

running 4 tests
test bench_many_c    ... bench:     105,897 ns/iter (+/- 7,498)
test bench_many_rust ... bench:     134,012 ns/iter (+/- 3,699)
test bench_one_c     ... bench:          29 ns/iter (+/- 0)
test bench_one_rust  ... bench:          80 ns/iter (+/- 2)

test result: ok. 0 passed; 0 failed; 0 ignored; 4 measured

functions.s

    .def     __ZN20copy_struct_one_rust20h4f6833aa9da89dbdPaaE;
    .scl    2;
    .type   32;
    .endef
    .globl  __ZN20copy_struct_one_rust20h4f6833aa9da89dbdPaaE
    .align  16, 0x90
__ZN20copy_struct_one_rust20h4f6833aa9da89dbdPaaE:
    .cfi_startproc
    subl    $12, %esp
Ltmp6:
    .cfi_def_cfa_offset 16
    movl    20(%esp), %eax
    movl    16(%esp), %ecx
    movl    %ecx, 4(%esp)
    movl    %eax, (%esp)
    movl    $400, 8(%esp)
    calll   _memcpy
    addl    $12, %esp
    retl
    .cfi_endproc

    .def     __ZN21copy_struct_many_rust20hfdf380f818cc18a86aaE;
    .scl    2;
    .type   32;
    .endef
    .globl  __ZN21copy_struct_many_rust20hfdf380f818cc18a86aaE
    .align  16, 0x90
__ZN21copy_struct_many_rust20hfdf380f818cc18a86aaE:
    .cfi_startproc
    pushl   %ebp
Ltmp7:
    .cfi_def_cfa_offset 8
    pushl   %ebx
Ltmp8:
    .cfi_def_cfa_offset 12
    pushl   %edi
Ltmp9:
    .cfi_def_cfa_offset 16
    pushl   %esi
Ltmp10:
    .cfi_def_cfa_offset 20
    subl    $12, %esp
Ltmp11:
    .cfi_def_cfa_offset 32
Ltmp12:
    .cfi_offset %esi, -20
Ltmp13:
    .cfi_offset %edi, -16
Ltmp14:
    .cfi_offset %ebx, -12
Ltmp15:
    .cfi_offset %ebp, -8
    movl    44(%esp), %edx
    testl   %edx, %edx
    je  LBB3_5
    movl    36(%esp), %ecx
    testl   %ecx, %ecx
    je  LBB3_5
    movl    40(%esp), %esi
    movl    32(%esp), %eax
    imull   $400, %ecx, %ecx
    leal    (%ecx,%eax), %edi
    movl    %eax, %ecx
    addl    $400, %ecx
    imull   $400, %edx, %ebx
    addl    $-400, %ebx
    .align  16, 0x90
LBB3_3:
    movl    %ecx, %ebp
    movl    %eax, 4(%esp)
    movl    %esi, (%esp)
    movl    $400, 8(%esp)
    calll   _memcpy
    leal    400(%ebp), %ecx
    cmpl    %edi, %ebp
    cmovel  %ebp, %ecx
    movl    %ebp, %eax
    movl    $0, %edx
    cmovel  %edx, %eax
    testl   %ebx, %ebx
    je  LBB3_5
    addl    $400, %esi
    addl    $-400, %ebx
    testl   %eax, %eax
    jne LBB3_3
LBB3_5:
    addl    $12, %esp
    popl    %esi
    popl    %edi
    popl    %ebx
    popl    %ebp
    retl
    .cfi_endproc

    .def    _copy_struct_one_c;
    .scl    2;
    .type   32;
    .endef
_copy_struct_one_c:
LFB1:
    .cfi_startproc
    pushl   %edi
    .cfi_def_cfa_offset 8
    .cfi_offset 7, -8
    pushl   %esi
    .cfi_def_cfa_offset 12
    .cfi_offset 6, -12
    movl    12(%esp), %esi
    movl    16(%esp), %ecx
    movl    (%esi), %eax
    leal    4(%ecx), %edi
    andl    $-4, %edi
    movl    %eax, (%ecx)
    movl    396(%esi), %eax
    movl    %eax, 396(%ecx)
    subl    %edi, %ecx
    subl    %ecx, %esi
    addl    $400, %ecx
    shrl    $2, %ecx
    rep movsl
    popl    %esi
    .cfi_restore 6
    .cfi_def_cfa_offset 8
    popl    %edi
    .cfi_restore 7
    .cfi_def_cfa_offset 4
    ret
    .cfi_endproc

    .def    _copy_struct_many_c;
    .scl    2;
    .type   32;
    .endef
_copy_struct_many_c:
LFB2:
    .cfi_startproc
    pushl   %ebp
    .cfi_def_cfa_offset 8
    .cfi_offset 5, -8
    pushl   %edi
    .cfi_def_cfa_offset 12
    .cfi_offset 7, -12
    pushl   %esi
    .cfi_def_cfa_offset 16
    .cfi_offset 6, -16
    pushl   %ebx
    .cfi_def_cfa_offset 20
    .cfi_offset 3, -20
    movl    28(%esp), %ebp
    movl    20(%esp), %ebx
    movl    24(%esp), %edx
    testl   %ebp, %ebp
    je  L3
    imull   $400, %ebp, %ebp
    xorl    %eax, %eax
    .p2align 4,,10
L5:
    leal    (%ebx,%eax), %esi
    leal    (%edx,%eax), %ecx
    addl    $400, %eax
    movl    (%esi), %edi
    movl    %edi, (%ecx)
    movl    396(%esi), %edi
    movl    %edi, 396(%ecx)
    leal    4(%ecx), %edi
    andl    $-4, %edi
    subl    %edi, %ecx
    subl    %ecx, %esi
    addl    $400, %ecx
    shrl    $2, %ecx
    cmpl    %ebp, %eax
    rep movsl
    jne L5
L3:
    popl    %ebx
    .cfi_restore 3
    .cfi_def_cfa_offset 16
    popl    %esi
    .cfi_restore 6
    .cfi_def_cfa_offset 12
    popl    %edi
    .cfi_restore 7
    .cfi_def_cfa_offset 8
    popl    %ebp
    .cfi_restore 5
    .cfi_def_cfa_offset 4
    ret
    .cfi_endproc