On 25.12.2012 18:10, Mark Morgan Lloyd wrote:
Florian Klaempfl wrote:
Am 25.12.2012 15:11, schrieb Paul Ishenin:
25.12.12, 21:59, Yury Sidorov ?????:
Hmm, Seems to be a false alarm :(
I've made some tests just now with memory allocation and found that
such
pooling will not speed up the compiler too much. Only minor improvement
such as 10-20% :(
10-20% is still much better than nothing.
Yes, but you might also pay with a higher memory footprint which might
even eat this speed advantage under certain circumstances.
If the memory footprint was less than was needed for the linkage stage
would this matter?
Obviously this isn't comparing "like with like", since the compiler
footprint would presumably be per-unit rather than for the entire
program. But any realistic development system has to be prepared to
allocate enough memory for linkage, 512Mb is realistic for building e.g.
Lazarus so it's reasonable to argue that that space is also available
for compilation.
If you compile a project from scratch (let's keep aside the RTL, FCL and
LCL) then the compiler will keep more data in memory than when the
project is recompiled and e.g. no of the dependant units were changed.
Regards,
Sven
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