To turn off Safe Sleep, enter the following code in the Terminal and then press enter:
sudo pmset -a hibernatemode 0
To delete the Safe Sleep image, enter this and then press enter:
sudo rm /private/var/vm/sleepimage
And, if you want to turn Safe Sleep back on again, enter this and then press enter:
sudo pmset -a hibernatemode 3
Winged Boar Pub 
[…] an SSD, I disabled safe sleep/hibernation (to prevent excessive writes to the SSD during sleep), details of how to do this can be found here. Sleep now takes 5 seconds (before it took around 30) and resuming to a useable desktop is […]