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Language features for tracing JIT?Are there any special programming language features ("superpowers") that are made possible by specifically exploting a tracing JIT compiler? It seems to me like tracing JITs are often developed for existing languages (JavaScript, Python, Lua, etc) and tend to focus on efficiently compiling the existing code bases that are written with their traditional programming idioms. I am interested in the opposite approach: what programming idioms and language extensions can help programmers to make the most of their tracing JIT compiler? I can offer one candidate. Tracing JIT compilers can choose to specialize machine code based on the exact values of parameters that are only available at runtime, and the language can facilitate "hinting" whether a certain variable should be specialized on its value (e.g. generate machine code for the specific case that Is that a legitimate superpower? what are some others? what tricks can tracing JIT users exploit to leave C/C++ hackers eating their dust? :-) By Luke Gorrie at 2017-08-17 13:32 | LtU Forum | previous forum topic | next forum topic | other blogs | 4071 reads
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