GOEXPERIMENT source code build

[Leah Stapleton]

Hi, 

I have a question about building go source code to run the tests go swiss maps experiments.

first off, 

There are tests with the same name in map_swiss_test.go and map_noswiss_test.go, and when I go test -run TestMapIterOrder, it is by default running the test in map_noswiss_test.go, so I assume I need to build the source code for this experiment.

How do I indicate I want the go source code build to use swiss maps experiment? 

I normally run just run /make.bash from the /src dir. 

[Michael Pratt]

You can just set the environment variable, so `GOEXPERIMENT=swissmap go test`.

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[Ian Lance Taylor]

Set GOEXPERIMENT=swissmap in the environment when invoking the go
tool. You don't have to run make.bash again.

Ian