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User:GijsKruitbosch/JS Debugging: Difference between revisions
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→__toplevel__ and disappearing scripts
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''Ah, yes, OK. So would it be enough to do minimal work to protect the script object against GC, and unprotect it when we would normally discard the line map information? That would give us a material performance gain, I believe, and avoid the disappearing-script problem you rightly fear. --shaver'' | ''Ah, yes, OK. So would it be enough to do minimal work to protect the script object against GC, and unprotect it when we would normally discard the line map information? That would give us a material performance gain, I believe, and avoid the disappearing-script problem you rightly fear. --shaver'' | ||
I'm not too sure when such protection would be turned off, as the line map for a given script may be needed at any point up to the disappearance of it from the loaded scripts list (which I believe occurs when all the JSScript objects for that instance evaporate). More investigation on the result of the profile is needed, as I can only find calls to the isLineExecutable/line map stuff for __toplevel__ and not for functions '''unless''' the script's URL has breakpoints set. | |||