Re: [Boost-users] More than strange performance test results of Boost.MultiIndex

Subject: Re: [Boost-users] More than strange performance test results of Boost.MultiIndex
From: Dominique Devienne (ddevienne_at_[hidden])
Date: 2014-11-19 03:11:57

On Wed, Nov 19, 2014 at 6:00 AM, Ernest Zaslavsky <
ernest.zaslavsky_at_[hidden]> wrote:

>  [...] it may happen in production – you will have 5-15 strings across 1M
> of objects.
>

Just be aware that for low cardinality of distinct values in many rows, and
a non-unique index, you can have much better performance for some access
patterns with ordered indices compared to hashed ones. We had such an
issue, easily fixed by going to an ordered index. FWIW. --DD