[issue39737] Speed up list.__eq__ by about 6%

[Dennis Sweeney]

Dennis Sweeney <sweeney.dennis650 at gmail.com> added the comment:

> Hmm, Is this build on release mode?

Yes--in debug mode, each Py_INCREF is these 8 instructions:

========================
78BD071E  mov         ecx,dword ptr [_Py_RefTotal (79039700h)]  
78BD0724  add         ecx,1  
78BD0727  mov         dword ptr [_Py_RefTotal (79039700h)],ecx  
78BD072D  mov         edx,dword ptr [ebp-10h]  
78BD0730  mov         eax,dword ptr [edx]  
78BD0732  add         eax,1  
78BD0735  mov         ecx,dword ptr [ebp-10h]  
78BD0738  mov         dword ptr [ecx],eax  
========================

instead of just the one `inc` in release mode.

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<https://bugs.python.org/issue39737>
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