3.8 KiB
3.8 KiB
The Tengo Language
Tengo is a small, dynamic, fast, secure script language for Go.
Tengo is fast and secure because it's compiled/executed as bytecode on stack-based VM that's written in native Go.
/* The Tengo Language */
fmt := import("fmt")
each := func(seq, fn) {
for x in seq { fn(x) }
}
sum := func(init, seq) {
each(seq, func(x) { init += x })
return init
}
fmt.println(sum(0, [1, 2, 3])) // "6"
fmt.println(sum("", [1, 2, 3])) // "123"
Run this code in the Playground
Features
- Simple and highly readable Syntax
- Dynamic typing with type coercion
- Higher-order functions and closures
- Immutable values
- Garbage collection
- Securely Embeddable and Extensible
- Compiler/runtime written in native Go (no external deps or cgo)
- Executable as a standalone language / REPL
- Use cases: rules engine, state machine, gaming, data pipeline, transpiler
Benchmark
| fib(35) | fibt(35) | Type | |
|---|---|---|---|
| Go | 48ms |
3ms |
Go (native) |
| Tengo | 2,349ms |
5ms |
VM on Go |
| Lua | 1,416ms |
3ms |
Lua (native) |
| go-lua | 4,402ms |
5ms |
Lua VM on Go |
| GopherLua | 4,023ms |
5ms |
Lua VM on Go |
| Python | 2,588ms |
26ms |
Python (native) |
| starlark-go | 11,126ms |
6ms |
Python-like Interpreter on Go |
| gpython | 15,035ms |
4ms |
Python Interpreter on Go |
| goja | 5,089ms |
5ms |
JS VM on Go |
| otto | 68,377ms |
11ms |
JS Interpreter on Go |
| Anko | 92,579ms |
18ms |
Interpreter on Go |
* fib(35): Fibonacci(35)
* fibt(35): tail-call version of Fibonacci(35)
* Go does not read the source code from file, while all other cases do
* See here for commands/codes used