Hi Andreas, It looks like you may have problems with hash collisions FLLargeIdentityDictionary. What are the tally sizes of the FLLargeIdentityDicitonary used when you serialize? (If these have a tally larger than ~ 75% of the available size (4096 items), then there may well be some performance loss).
You could check if file writing is the problem by measuring the time it takes to only serialize in memory. You can try to use: "FLSerializer serializeToByteArray: " and see if it gives petter performance? Best regards, Henrik -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html
