@gaphic: "Just migrated a 400 page book from CS3 to CS4 (55Mb file with about 100 placed graphics).
CS4 seems to have trouble keeping up - after less than a minute of editing Indesign freezes five out of every 20 seconds, with little disk activity but high (50%) cpu load.
This does not occur when working on small files. Choosing fast display performace or closing panels does not make a difference.
I'm on XP Pro with a 2,33Ghz Core 2 Duo processor, a 256 Mb dedicated graphics card, 3 Gigs ram and a 7200 rpm drive.
Has anybody else here experienced similar issues?"
    @kahrel: "By default, InDesign now preflights documents on the fly continuously. Disabling that will probably speed up processing your documents: Window > Output > Preflight, then uncheck the On box.
Peter"
    @gaphic: "Thanks for your replies.
@ Peter: Yep, live preflight was the culprit. Once I turned that off, performance was OK.
@ Dov: I deleted half the book and the slowdown was markedly less.
What kind of a system would I need to be able to use live preflight in 200+ page graphic intensive books? I've been wondering what Indesign's performance bottleneck is. Am I right in assuming that for heavy projects it needs raw processing power above all? And on a single core - as it does not benefit of multiple processors. Does anyone have insight in Indesign's use of the GPU? It wouldn't use any 3D capabilities, right?"
    @erfg1: "Running CS4 with preflight locks up my computer every 10 seconds.
Working on a 96 page catalog. Caused my company a lot of time and money trying to fix this problem.
Running intel quad core 2.4ghz, 4 gigs of ram, Windows Vista 64bit Business edition, 512mb ATI video card.
Disabled preflight, stopped locking up. Preflight should be disabled by default, who knows why Adobe would turn this on by default when it causes so many problems."
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