unrolling loop of histogram buliding in order_bin.
unrolling loop of histogram buliding in order_bin.

henry0312/LightGBM,huanzhang12/LightGBM,olofer/LightGBM,henry0312/LightGBM,huanzhang12/lightgbm-gpu,huanzhang12/LightGBM,Allardvm/LightGBM,henry0312/LightGBM,olofer/LightGBM,henry0312/LightGBM,microsoft/LightGBM,olofer/LightGBM,henry0312/LightGBM,sightmachine/LightGBM,Allardvm/LightGBM,sightmachine/LightGBM,fstonezst/LightGBM,Laurae2/LightGBM,huanzhang12/LightGBM,wxchan/LightGBM,huanzhang12/lightgbm-gpu,wxchan/LightGBM,sightmachine/LightGBM,fstonezst/LightGBM,huanzhang12/LightGBM,fstonezst/LightGBM,microsoft/LightGBM,fstonezst/LightGBM,wxchan/LightGBM,huanzhang12/lightgbm-gpu,microsoft/LightGBM,huanzhang12/lightgbm-gpu,olofer/LightGBM,Allardvm/LightGBM,wxchan/LightGBM,sightmachine/LightGBM,microsoft/LightGBM,huanzhang12/LightGBM,Laurae2/LightGBM,huanzhang12/lightgbm-gpu,Laurae2/LightGBM,olofer/LightGBM,wxchan/LightGBM,Laurae2/LightGBM,Allardvm/LightGBM,Allardvm/LightGBM,Laurae2/LightGBM,microsoft/LightGBM,fstonezst/LightGBM