[PATCH] [LNT] Teach LNT to plot geomean trend

[Chris Matthews]

Yi, is this enabled by default?

I suppose a slowdown like this is fine if you don’t encounter it unless you ask for it.

> On Aug 19, 2014, at 6:20 AM, Yi Kong <kongy.dev at gmail.com> wrote:
> 
> On 18 August 2014 17:33, Chris Matthews <chris.matthews at apple.com> wrote:
>> When you say “making heavy jobs… possible”, does this mean anyone using sqlite is going to experience a noticeable slowdown?  If so, do you have any guess on the impact?
>> 
> 
> Public perf server was quite unstable on SQLite and longer access time
> will probably expose more concurrency issues and make it even worse.
> With PostgreSQL in place, it can process slightly heavier queries.
> 
> On the performance side, each plot incurs around 9 seconds rendering
> time on my SQLite setup with more than 1200 records. I updated the
> second patch to tweak the performance, now it takes about 7 seconds
> and uses less memory. For comparison, plotting history trend of a
> single test takes 3 seconds.
> 
> Under normal usage, this shouldn't affect the server load too much.
> 
> -Yi
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