Swift.Org Issue with Open Source Swift Project. Error: Xcrun: Error: Unable to Find Utility "Launch-With-Toolchain", Not a Developer Tool or in Path

Swift.org issue with open source swift project. Error: xcrun: error: unable to find utility launch-with-toolchain , not a developer tool or in PATH

The open source Swift toolchain from https://swift.org/download/#apple-platforms requires the latest Xcode 7.2 (currently: beta 4).

The location of the developer directory used by xcrun and other build tools must be set to this Xcode 7.2. This can be done from the command-line
with

sudo xcode-select -s /path/to/Xcode7.2-beta.app/Contents/Developer

or in the Xcode "Locations" preferences:

Best way to stress test a rails web app?

This is definitely not a free solution, but webmetrics will get the job done. (As well as any website monitoring company in general). They give thorough reports on your web site's performance, and when you schedule load tests you can specify how much load you want to simulate (e.g. simulate 2000 users using my site at once).

I don't think it will break it down and tell you your CPU usage and such, as they stress your website from their servers.

change xcrun developer path

sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer

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