Rhai - rust's embedded scripting engine

be based on Rust The richness and innovation of language , And ultra-high performance execution efficiency , Currently in the open source community , Produced many Rust Language embedded script engine .Rhai It's new , But the one with higher innovation .Rhai Provides a security 、 Add to any application in a simple way Rust Syntax script , But it kept Rust Language “ Zero cost ” Efficiency of execution .

Rhai Is in Rust Language features , have no-std characteristic , And dynamic types . Compile time overhead is very low , But the execution efficiency is considerable ： In a single core 2.3 GHz Of Linux Virtual machine ,0.3 Seconds , It has reached over a million iterations .

In detail ,Rhai Has the following characteristics （ Only a few are listed below ）：

• Easy to Be similar to Rust + JavaScript, And has a dynamic type . And Rust Functions and types are tightly integrated . Through the external scope , take Rust Variable / Constants are passed losslessly into the script , There is no need to implement any special features . from Rust In code , Easily call script defined functions . Few dependencies , What you actually have to have is 2 A third party Rust crate.
• Extremely fast

Very low compile time overhead .

After the evaluation , In a single core 2.3 GHz Of Linux Virtual machine ,0.3 Seconds , iteration 100 Ten thousand times .

Script optimization .

• dynamic function overloading . Operator overload . With dynamically loadable modules , To organize the code base . Function pointers can be dynamically scheduled . Closures that capture shared variables . Support for object-oriented programming （OOP）.
• flexible The script engine can be set to send + Sync （ Through the synchronization function ）. adopt serde crate Provide serialization 、 Deserialization supports . By excluding unwanted language features , To support minimal build . Support most build goals , Include no-std、WASM. You can disable keywords accurately by yourself 、 Operator , To restrict language . It can be used as DSL.

Rhai stay github Open source , After a period of trial by the author , The experience effect is very good . at present , In specific projects , The author is carrying out in-depth application ： It mainly focuses on the auxiliary aspect of template rendering .

After the author's in-depth experience , Therefore, it is recommended , Interested friends can visit the website ：https://rhai.budshome.com, For a detailed understanding .