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The Optimizations in Erlang/OTP 27
The official home of the Erlang Programming Language
Erlang/OTP 24 introduced the JIT (Just In Time compiler), which improved performance by emitting native code for BEAM instructions at load-time. In other words, from the compiler’s point of view, if the runtime system were to directly update the existing record without first copying it, the observable behavior of the program would not change. In Erlang/OTP 27, the part of fun that resides on the heap of the calling process has been simplified so that it is now smaller than in Erlang/OTP 26, and most importantly does not contain anything that is too tricky to initialize in inline code.
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