Very slow ErrorDetailHelper.MarkupStackTrace call with text from in a docker container.

[belav]

We ran into a situation where the elmah details page was taking ~8s to load when an error was thrown from our app running inside of docker. I narrowed it down to the call to ErrorDetailHelper.MarkupStackTrace

I was able to reproduce the problem by capturing the Error.Detail values from inside and outside of docker and putting them into unit tests.

belav@a8b9409

ThisIsSlow - takes ~20s to run
ThisIsFast - takes ~0s to run

Diffing the strings, one obvious change is
ThisIsSlow uses windows paths such as

C:\projects\insite-commerce\Src\Backend\Plugins\Search\Insite.Search.Elasticsearch\DocumentTypes\Product\Query\ProductSearchFacetProcessor.cs:line 357

ThisIsFast uses linux paths such as

/work/Src/Backend/Plugins/Search/Insite.Search.Elasticsearch/DocumentTypes/Product/Query/ProductSearchFacetProcessor.cs:line 357

I did a find and replace of \ with / in the slow version and that didn't seem to affect the speed of parsing. I haven't tried to debug/profile yet, which may narrow down the problem.