Mapping a lambda in the IDE is very slow

[kustosz]

General Summary

There's a huge performance discrepancy between calling my_vec.map x-> x.do_something 10
in the IDE and in the CLI. The discrepancy on my data is on the order of 5 seconds in the CLI vs. 20 minutes in the IDE.
Note that this only happens with lambdas (both -> and _) but not with curried methods,
I.e. the same lambda extracted to a module level method and passed to map like here.my_fun is fast in the IDE.
Because of this effect, my assumption is that the instrumentation framework triggers for nodes inside the lambda.

Steps to Reproduce

Map a semi-involved lambda over a large vector.

Expected Result

Same speed in CLI and IDE

Actual Result

Significant slowdown in the IDE

Enso Version

New one :)