[Mono-dev] Further improvements to toString performance
antonello.moro at elsagdatamat.com
Thu Mar 20 09:03:18 EDT 2008
Will it be included in a future mono official release?
Eyal Alaluf wrote:
> Hi, all.
> The attached patch contains further improvements to the perf or ToString
> of primitive types.
> The perf gain is due to two changes
> 1. An instance of NumberFormatter is placed as a member of the Thread
> class. This allows reuse of the character array within the NumberFormat
> class and to cache the lookup of the NumberFormatInfo from the current
> culture which turns out to be a costly operation.
> 2. The default ToString of integers has been specialized (because of
> its simplicity).
> The results of these improvements are:
> 10,000,000 * 12345.ToString(): From 13.0 Secs to 6.3 Secs
> 10,000,000 * 12345.ToString("G"): From 14.7 Secs to 8.4 Secs
> 10,000,000 * 0.12345.ToString(): From 27.9 Secs to 21.3 Secs
> The results were made on my (a bit outdated) PC but the same
> improvements were seen in newer types of machines.
> I have also added the copyright and license notice.
> Your comments are welcome.
> Thanks, Eyal.
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