In our previous episode, LacaK said: > As new nodes are appended TFPList.Expand is called > And there is: > if FCapacity > 127 then Inc(IncSize, FCapacity shr 2); > > So if I have in list 1 000 000 items, then at once list is expanded by > 250 000, which causes in one step out of memory > So my question is: can I somehow control increment count ? I think that > ATM no. > So second question is can TFPList.Expand be modified, that for large > FCapacity will be used smaller increment ? :-)
TMemoryStream also has this behaviour, and indeed I override it in my own applications to let the growth taper off after 128MB. If you have a lot of midsized memory streams, it otherwise results in having 25%/2 = 12.5% unused memory lieing around. But of course all datastructures based on a single array (and thus inviting very large block allocations) are fundamentally flawed because of it in the first place. _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
