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RE: [cdt-dev] Preparsed Index Setup Questions
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Thanks for the tip Andrew. I'll do some more
experimentation and post patches for the mods I've made for you to look
over.
Tim
hi Tim,
> The project PDOM is the
same size, same headers and added, and about the
> same time to re-index
whether or not the preparsed index is used.
This sounds like a problem with the IIndexLocationConverter - if the
paths
of includes the indexer requests do not
align with those contained in the
pre-built
index, then you get a situation like a cache miss and the file
will
be indexed anyhow. For an external SDK,
its likely that you can use
org.eclipse.cdt.core.index.URIRelativeLocationConverter
initialized with the URI of the logical base of the index
content. For example,
"file:/D:/Symbian/9.5/epoc32/include".
Running some quick benchmarks against HEAD, I see improvements
like
helloworld:
20KiB -> 20KiB, 3s -> 1s
'agenda' user application:
8MiB -> 940KiB, 12s -> 9s
The time
improvement is more modest than I expect for the second case. The
parsing
(not resolution) phase seems to be
taking longer - I'll try to find some time to see
why.
> 1) Only one preinclude
is allowed (-include arg) when generating a PDOM.
> I have a fix for
that if we want to allow > 1 preinclude, which I don't
> know why we
wouldn't.
> 2) Only one source path is allowed (-source arg). I have a
partial fix
> for that, adding multiple linked directories to be indexed
under the
> dummy project.
The
default command-line (ExternalExportProjectProvider) is very simple.
You
can provide an alternate implementation
with the -pprovider switch, but these
do
sound like good enhancements to have - if you're happy to raise a
bugzilla I'll aim to pick these up.
> 3) PDOM generation runs out of memory with too
many source files. I can
> log a bug which I can reproduce, but can't
provide sources.
I've not seen this - a
bugzilla with details such as number of files, heap size
etc.. is a good idea.
thanks,
Andrew
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