bench ClearSkyBox

```c++
#include <string.h>
#include <algorithm>
#include <iterator>
#include <limits>

float sky_mins[2][6], sky_maxs[2][6];

void ClearSkyBox1()
{
    std::fill( *sky_mins, (*sky_mins)+2*6, 9999 );
    std::fill( *sky_maxs, (*sky_maxs)+2*6, -9999 );
}

void ClearSkyBox2()
{
    static const float mins[ 2 ][ 6 ] = {
        { 9999, 9999, 9999, 9999, 9999, 9999 },
        { 9999, 9999, 9999, 9999, 9999, 9999 }
    };

    static const float maxs[ 2 ][ 6 ] = {
        { -9999, -9999, -9999, -9999, -9999, -9999 },
        { -9999, -9999, -9999, -9999, -9999, -9999 }
    };

    memcpy( sky_mins, mins, sizeof( mins ) );
    memcpy( sky_maxs, maxs, sizeof( maxs ) );
}

unsigned char i;

__attribute__((noinline)) void call1()
{
    for( i = 0; i < std::numeric_limits<decltype(i)>::max(); ++i )
    {
        ClearSkyBox1();
    }
}

__attribute__((noinline)) void call2()
{
    for( i = 0; i < std::numeric_limits<decltype(i)>::max(); ++i )
    {
        ClearSkyBox2();
    }
}

int main()
{
    while ( true )
    {
        call1();
        call2();
    }
}
```

# gcc -O2

* call1: 88.41%
* call2: 11.52%

```asm
asm: /* call1() */
Platform: X86 64 (Intel syntax)
0x55812a208200: endbr64
0x55812a208204: movss        xmm1, dword ptr [rip + 0xe84]
0x55812a20820c: movss        xmm0, dword ptr [rip + 0xe80]
0x55812a208214: mov          esi, 0xffffffff
0x55812a208219: lea          rcx, [rip + 0x2eb0]
0x55812a208220: lea          rdx, [rip + 0x2e69]
0x55812a208227: nop          word ptr [rax + rax]
0x55812a208230: lea          rax, [rip + 0x2e69]
0x55812a208237: nop          word ptr [rax + rax]
0x55812a208240: movss        dword ptr [rax], xmm1
0x55812a208244: add          rax, 4
0x55812a208248: cmp          rax, rcx
0x55812a20824b: jne          0x55812a208240
0x55812a20824d: lea          rax, [rip + 0x2e0c]
0x55812a208254: nop          dword ptr [rax]
0x55812a208258: movss        dword ptr [rax], xmm0
0x55812a20825c: add          rax, 4
0x55812a208260: cmp          rax, rdx
0x55812a208263: jne          0x55812a208258
0x55812a208265: sub          sil, 1
0x55812a208269: jne          0x55812a208230
0x55812a20826b: mov          byte ptr [rip + 0x2dce], 0xff
0x55812a208272: ret
0x55812a208273:
```

```asm
asm: /* call2() */
Platform: X86 64 (Intel syntax)
0x55812a208280: endbr64
0x55812a208284: lea          r9, [rip + 0x2e15]
0x55812a20828b: lea          rsi, [rip + 0x2dce]
0x55812a208292: movdqa       xmm5, xmmword ptr [rip + 0xdd6]
0x55812a20829a: movdqa       xmm4, xmmword ptr [rip + 0xdde]
0x55812a2082a2: lea          r8, [r9 + 0x10]
0x55812a2082a6: lea          rcx, [rsi + 0x10]
0x55812a2082aa: movdqa       xmm3, xmmword ptr [rip + 0xd7e]
0x55812a2082b2: movdqa       xmm2, xmmword ptr [rip + 0xd86]
0x55812a2082ba: movdqa       xmm1, xmmword ptr [rip + 0xd9e]
0x55812a2082c2: movdqa       xmm0, xmmword ptr [rip + 0xd56]
0x55812a2082ca: lea          rdi, [r8 + 0x10]
0x55812a2082ce: lea          rdx, [rcx + 0x10]
0x55812a2082d2: mov          eax, 1
0x55812a2082d7: nop          word ptr [rax + rax]
0x55812a2082e0: movaps       xmmword ptr [r9], xmm1
0x55812a2082e4: movaps       xmmword ptr [rsi], xmm0
0x55812a2082e7: movaps       xmmword ptr [r8], xmm5
0x55812a2082eb: movaps       xmmword ptr [rcx], xmm3
0x55812a2082ee: mov          byte ptr [rip + 0x2d4c], al
0x55812a2082f4: movaps       xmmword ptr [rdi], xmm4
0x55812a2082f7: movaps       xmmword ptr [rdx], xmm2
0x55812a2082fa: add          al, 1
0x55812a2082fc: jne          0x55812a2082e0
0x55812a2082fe: ret
0x55812a2082ff:
```

# gcc -O3

* call1: 1.25%
* call2: 97.86%

```asm
asm: /* call1() */
Platform: X86 64 (Intel syntax)
0x55a33459c1f0: endbr64
0x55a33459c1f4: movaps       xmm0, xmmword ptr [rip + 0xe95]
0x55a33459c1fb: mov          byte ptr [rip + 0x2e3e], 0xff
0x55a33459c202: movaps       xmmword ptr [rip + 0x2e97], xmm0
0x55a33459c209: movaps       xmmword ptr [rip + 0x2ea0], xmm0
0x55a33459c210: movaps       xmmword ptr [rip + 0x2ea9], xmm0
0x55a33459c217: movaps       xmm0, xmmword ptr [rip + 0xe82]
0x55a33459c21e: movaps       xmmword ptr [rip + 0x2e3b], xmm0
0x55a33459c225: movaps       xmmword ptr [rip + 0x2e44], xmm0
0x55a33459c22c: movaps       xmmword ptr [rip + 0x2e4d], xmm0
0x55a33459c233: ret
0x55a33459c234:
```

```asm
asm: /* call2() */
Platform: X86 64 (Intel syntax)
0x55a33459c240: endbr64
0x55a33459c244: lea          r9, [rip + 0x2e55]
0x55a33459c24b: lea          rsi, [rip + 0x2e0e]
0x55a33459c252: movdqa       xmm5, xmmword ptr [rip + 0xe16]
0x55a33459c25a: movdqa       xmm4, xmmword ptr [rip + 0xe1e]
0x55a33459c262: lea          r8, [r9 + 0x10]
0x55a33459c266: lea          rcx, [rsi + 0x10]
0x55a33459c26a: movdqa       xmm3, xmmword ptr [rip + 0xdbe]
0x55a33459c272: movdqa       xmm2, xmmword ptr [rip + 0xdc6]
0x55a33459c27a: movdqa       xmm1, xmmword ptr [rip + 0xdde]
0x55a33459c282: movdqa       xmm0, xmmword ptr [rip + 0xd96]
0x55a33459c28a: lea          rdi, [r8 + 0x10]
0x55a33459c28e: lea          rdx, [rcx + 0x10]
0x55a33459c292: mov          eax, 1
0x55a33459c297: nop          word ptr [rax + rax]
0x55a33459c2a0: movaps       xmmword ptr [r9], xmm1
0x55a33459c2a4: movaps       xmmword ptr [rsi], xmm0
0x55a33459c2a7: movaps       xmmword ptr [r8], xmm5
0x55a33459c2ab: movaps       xmmword ptr [rcx], xmm3
0x55a33459c2ae: mov          byte ptr [rip + 0x2d8c], al
0x55a33459c2b4: movaps       xmmword ptr [rdi], xmm4
0x55a33459c2b7: movaps       xmmword ptr [rdx], xmm2
0x55a33459c2ba: add          al, 1
0x55a33459c2bc: jne          0x55a33459c2a0
0x55a33459c2be: ret
```