Michael Tsai
Opened a 4.5 MB CSV file in Numbers in 58 seconds on rMBP. Do a search, it beachballs for 20 seconds. Excel opens it in 1 second.
rentzsch
@mjtsai the dangers of promoting all data to NSObjects. Mail.app learned the same lesson long ago. C++ has its place.
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@Catfish_Man@rentzsch OK, I took a quick sample. Almost all the loading time is spent parsing strings into dates as it creates cells. -
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@Catfish_Man Will do; thanks. Seems like this is something they could fix without a major redesign.
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@rentzsch I wonder whether they have calculation cells registering for KVO with all the dependent data cells… -
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@cocoalabs@rentzsch I don’t think flyweight is applicable here; I bet the problem is the number of objects, not the data hanging off them. - View other replies
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@cocoalabs@rentzsch I agree that demand paging with a cell-type architecture would work. I thought Flyweight was more like interning. - Show more
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@grynspan see my conversation with@cocoalabs -
@rentzsch Oh, I see. I thought you were knocking on dynamic typing and was like "huh." More specific than that.@cocoalabs
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@rentzsch ObjC instances are like radiation, the right quantity can be therapeutic, too many is almost certainly deadly :)
David Smith
Jonathan Grynspan
Avi Drissman
Andrew Wooster
Christopher Lloyd
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