Hi. I am making a library for user submitted templates (so users can customize email content). I have a parser which parses the template to an AST, and now I am implementing evaluating the template. My first pass was to interpret the template, going over the AST every time it renders, then my secon…

Are you running these benchmarks directly in IEx? IEx — IEx v1.20.2

Not sure I understand why plain macros won’t do what you need. Macros don’t have any runtime performance penalty since its just compile time expansion into the code you would have written if you did it without a macro. Why do you need to generate any code at runtime, no doubt its slow. Are you recei…

The use case is that they are runtime strings. E.g. the user has defined an email template for their account. It works very similar to the way Jinja templates are built for Python. A domain specific language is passed in, converted, generates native code in the host language, This creates templates …

[image] hansonkd: However, my question isn’t to debate about the purpose of my program The purpose of the program definitely matters, because there may be simpler solutions available. When you are evaluating code at runtime, there are at a minimum 4 or 5 compiler passes involved, to build so…

Lets jut say the purpose of my program is to build the fastest runtime template engine and explore the inner workings of Elixir. :slight_smile: Essentially I am trying to answer the question, if you are sending out 1k emails, does the benefit of compiling outweigh the overhead? My work was inspired…

Right, the compiled approach will always be faster. If you have a general template engine, then the compiled approach will be faster and probably simpler. However, if your template engine is limited (think mustache/handlebars), then I would precompile only the template into a Template AST and not n…

Yes, you are probably right that interpreted is probably enough since IO to send the email will most likely be the limiting factor, performance wise. Just incase anybody reads this in the future, my results on a small template with nested loops.(“compiledFully” uses Code.compile outlined above, “se…

Only code inside modules is compiled, code outside modules is always interpreted through erl_eval. So even when you define the fun inside Code.eval_string you’re not compiling the function - what you receive is a reference to a function that will be interpreted when executed. That’s why threre’s not…

Dynamic function generation at runtime with Code.eval_... very slow

Questions & Help Questions

dom October 11, 2018, 12:10am 2

Are you running these benchmarks directly in IEx?