I have run into an issue described at 

What is happening is that the GC keeps collecting map (hidden class) of a 
function ("class") that is called not very often but always runs quite a 
long time. As a result, the functions ends up being deoptimized and the 
code runs up to 20 times slower.

Would it be possible to add some conditions/heuristics to the V8 garbage 
collector to prevent this behaviour?

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