9.0 is noticeable slower than 8.5.5

on linux 64 bits, no additional plugins/extensions, "safest" security setting, javascript disabled (javascript.enabled = false)

i clearly notice lower performance in content when i execute some of my own scripts (e.g. entered in the console), delays of up to a second or slightly more for operations which in 8.5.5 were instantaneous, but i can also perceive some general performance degradation for chrome

did you change some compilation optimisation parameters? or ionmonkey optimisation preferences?

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