Should enable forcetrim to MBP 15" 2010 mid with Intel SSD?

Dear All,
我買一顆Intel SSD 535 480G for my MBP 15" 2010 mid. 我該開啟trim by "sudo forcetrim enable"? 我現在write速度還不錯 .

$ time dd if=/dev/zero bs=1024k of=tstfile count=1024
1024+0 records in
1024+0 records out
1073741824 bytes transferred in 4.190765 secs (256216192 bytes/sec)

Thanks!