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<p>Yeah, it sounds like a good approach to tackle header caching a bit later. "P<span>recompiled preamble" looks promising so we can keep this in mind as we go.</span></p>
<p><span><br>
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<p><span>Cheers,</span></p>
<p><span>Marc-André<br>
</span></p>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Doug Schaefer <dschaefer@blackberry.com><br>
<b>Sent:</b> Thursday, May 18, 2017 10:44:18 AM<br>
<b>To:</b> Marc-André Laperle; via cfe-dev<br>
<b>Cc:</b> zeratul976@hotmail.com; zaks.anna@gmail.com; Dániel Krupp; Zoltan Porkoláb; Marton Csordas<br>
<b>Subject:</b> Re: Adding indexing support to Clangd</font>
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<div class="PlainText">On 2017-05-17, 6:38 PM, "Marc-André Laperle"<br>
<marc-andre.laperle@ericsson.com> wrote:<br>
> - For header caching, I wonder if it is possible to reuse the<br>
>precompiled header support in Clang. There would be some logic that would<br>
>decide whether or not a precompiled header could be used depending on the<br>
>preprocessing context (same macro definitions, etc).<br>
<br>
Išm not certain header cacheing is needed right away. We did it in the CDT<br>
because our parsers were fairly slow and indexing a project took a very<br>
long time. I have hope that clang would be faster. At the very least, you<br>
would want cacheing to be optional so you need to be able to work without<br>
it. But make sure you have the architecture to graft it in later.<br>
<br>
In CDT we cheated a lot to gain performance and the cost of accuracy. The<br>
results are still very good so its an interesting balancing act.<br>
<br>
Doug Schaefer<br>
Eclipse CDT Project Lead<br>
<br>
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