I need to speed up my computer. even when im opening workspace switcher, is lagging! the cpu usage is over 50% all the time and it increases to 100% with a simple mouse move.
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You can get the correct hardware support for your GPU instead of burdening your CPU with graphics.
Look for hardware acceleration wherever you can find it and install all the opengl mesa etc. If using nvidia or other non intel, go to software center, click "edit" select "software sources" and click on the "additional drivers" tab. There you will see proprietary drivers if there are any available for your setup. Reboot for changes to take effect. The "tested" versions are usually the most stable.For intel see here
If you're using an older system, make sure you have enough swappiness and swap space to take the load off the system when it's needed. Also, many older systems benefit from the use of zram: see this post
Switch to a lighter desktop like Ubuntustudio Xubuntu or Lubuntu. All of these are designed for system performance through low overhead and minimal use of desktop effects.
