24768 - [perf]Move view navigation code into C++

Status: VERIFIED FIXED

(MailNews Core :: Backend, defect, P3)

Description

[scottputterman]

Currently all of the view navigation code (Next Unread, etc) is in js.  
Waterson did some Quantifying and found that we were spending a lot of time in 
js code. Since looking for the first new message is part of folder loading, 
this is important.  In fact, looking for the first new message was taking up to 
15% of the time to load a large folder.  

I moved the simplest case into C++ already and it cut the time to find the next 
message in about 1/8th!  So I will continue to port the rest of the code and 
then use Quantify to optimize it.

Comment 1

[scottputterman]

It's been moved.  More optimizations could be made, but this is a big 
improvement already.

Comment 2

[varada]

Marking Verified Fixed.
WinNT 2000102008
Mac 2000102008
Linux 2000102009