How deeply does Modern Angular cover just-in-time compilation?

Explains template-to-JavaScript compilation, development trade-offs, and AOT contrast, but omits compiler internals.

Just-in-time compilation

Just-in-time compilation is compilation performed during application startup or execution rather than entirely before deployment.

Just-in-time compilation (JIT) compiles an Angular application's templates while the application starts or runs. With ng serve, Angular bootstraps the application and compiles templates in the browser, making development faster despite poorer runtime performance. section 9.2.3

Production deployment instead uses ng build to create a precompiled application through ahead-of-time compilation (AOT), allowing the browser to execute generated rendering commands directly. Both approaches compile templates into JavaScript commands, supporting rendering on the server and in the browser. section 9.2.3

The practical distinction is:

Use JIT during development when faster development build times matter most. section 9.2.3
Use AOT for production so templates are compiled before deployment and need not be compiled in the browser. section 9.2.3

How Modern Angular covers it

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Also explained in

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Deep Learning with JAXCompilation performed at runtime so code can be specialized and optimized for actual inputs and hardware.
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.NET in Action, Second EditionA just-in-time compiler translates intermediate code into machine code during program execution.
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Julia as a Second LanguageA just-in-time compiler compiles program code into executable machine code during program execution.
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Deep Learning with R, Third EditionJust-in-time compilation is the compilation of program code during execution into an optimized form for subsequent execution.
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Experimentation for EngineersA just-in-time compiler translates code into machine code during program execution rather than exclusively before execution.
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Deep Learning with PyTorch, Second EditionA compilation strategy that performs code optimization or translation during execution rather than before runtime.

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Related concepts

JavaScript engineused by · A JavaScript engine is software that parses, compiles or interprets, and executes JavaScript code.
Juliaused by · Julia is a high-level, high-performance programming language designed for numerical, scientific, and technical computing.
machine languageproduces · Machine language is a processor-specific instruction language encoded in a form that computer hardware can execute directly.
ahead-of-time compilationcontrasts with · Ahead-of-time compilation is the translation of program code into executable or loadable form before program execution begins.

This explainer was generated by Manning's knowledge graph from the text of Modern Angular. The section links point to the parts of the book it draws on.