Seems to be a 1.5% progression on JS2 on some iOS devices.
Created attachment 441300 [details] patch
Comment on attachment 441300 [details] patch r=me
Comment on attachment 441300 [details] patch Ignore this bug. The A/B task I ran to determine it's faster was actually backwards. It was showing that it's slower. So, good news for more confirmation that EXTRA_CTI_THUNKS is a win.