Consider FastExpressionCompiler for compiling lambda expressions. #542
Description
For the in-memory operations, we're compiling the lambda expressions we have in the spec. The built-in Expression.Compile() is quite slow and memory intensive.
The FastExpressionCompiler NuGet package offers faster compilation and allocates less memory. For a long time, I've been in doubt whether we should introduce this dependency or not. The hesitation is based on:
- It emits IL code. I'm sure the author has done a great job, but emitting IL is always error prone, too many edge cases (at least in my experience).
- Not all node types are supported. Are we sure these nodes will never be used in our case?
Perhaps we may check and fallback to built-in Compile? What is the overhead of all those checks? Anyhow, let's consider this and do some preliminary tests.
Related to #541