Snow leopard 64bit
Probably everyone has heard about the transition to 64-bit architecture in Snow Leopard. But not everyone knows that, by default, SL is loaded in 32-bit mode, for compatibility with old kernel extensions. However, SL can still be forced to load the 64-bit kernel by default, which will give some performance gain. A performance comparison of Leopard / Snow Leopard 32bit / Snow Leopard 64bit can be found here .
To boot into the 64-bit kernel by default, you need to open a terminal, and run the following command:
sudo nvram boot-args = "arch = x86_64"
To return to the 32-bit kernel:
sudo nvram boot-args = ""
And now the most interesting thing about performance: when working in the 64-bit kernel, watching video consumes much less CPU - for example, when I watch a TV series with lostfilm in VLC, CPU consumption has decreased from ~ 19% to ~ 8%. When viewing HD 720p - from 60% to 28%. This saving of processor resources is especially useful for macbook users - less load on the processor, longer battery life.
UPD: iTunes also began to consume less CPU - 3%, instead of 10% in 32-bit mode
To boot into the 64-bit kernel by default, you need to open a terminal, and run the following command:
sudo nvram boot-args = "arch = x86_64"
To return to the 32-bit kernel:
sudo nvram boot-args = ""
And now the most interesting thing about performance: when working in the 64-bit kernel, watching video consumes much less CPU - for example, when I watch a TV series with lostfilm in VLC, CPU consumption has decreased from ~ 19% to ~ 8%. When viewing HD 720p - from 60% to 28%. This saving of processor resources is especially useful for macbook users - less load on the processor, longer battery life.
UPD: iTunes also began to consume less CPU - 3%, instead of 10% in 32-bit mode
')
Source: https://habr.com/ru/post/82193/
All Articles