Just to check the performance of a kernel and revert if not satisfactory, without making any changes to your device.
Yes you can . With the Xperia flash tool .Read More here
Get your Xperia flash tool from here
Connect your phone to the tool in fastboot mode or Connect in adb mode and reboot to Fastboot mode.
Now , Click on the lightning icon and choose "Fastboot mode". Now Click "Select Kernel to Hotboot " option and choose the Kernel file. And your device will boot in Hot boot . Once your restart your device you will return to the previous kernel .
PS: Use the kernel file included in the Rom Zip file for Best performance.
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