After we added the loop opcodes, I wanted to remove op_jless, as we now have op_loop_if_less. It will only be used when less is inside of a logical operator, which doesn't really justify its continued existence. Removing it was originally a random slowdown on SunSpider, but now it's a 0.1% speedup.
Created attachment 22845 [details] Proposed patch
Comment on attachment 22845 [details] Proposed patch r=me
*** Bug 19823 has been marked as a duplicate of this bug. ***
Landed in r35810.