Running Go code inside a NodeJS app with WASM (Part 1/2, 2023)

• wasmer-go

  11 2,729 0.0 Go

  🐹🕸️ WebAssembly runtime for Go

  

However, there are other, more fleshed-out, libraries like wasmer-go that provides a runtime and help us navigate around these limitations. The wasmer-go documentation provides a good summary of these challenges:

• wasi-libc

  48 794 7.7 C

  WASI libc implementation for WebAssembly

  

Communication between the WASM module and the rest of the application needs to be done in very simple types (bytes, ints and floats). No complex types are supported yet. This is why most WASM compilers also provide some glue-code to map between complex types like strings or arrays. The Web Assembly System Interface (WAS) is an on-progress standard aimed to solve this last limitation; once it's mature it will allow easy interoperation with almost every environment. WASI is already available in some WSAM compilers and runtimes.

• InfluxDB

  www.influxdata.com sponsored

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• TinyGo

  95 14,439 9.4 Go

  Go compiler for small places. Microcontrollers, WebAssembly (WASM/WASI), and command-line tools. Based on LLVM.

  

Then, it is important to point out that our example only works in NodeJS. The compiled WASM module cannot be used in other WASM-enabled environments. Regardless, we can take the same code and use tools like wasmer-go or tinygo and this limitation can be worked around.

• readable-stream

  37 1,015 5.9 JavaScript

  Node-core streams for userland

  

First, we create a NodeJS ReadStream using fs.createWriteStream to open the test.log file in "append" mode. Then we start recursively looping using setTimeout. This simulates an application that logs text in the file at a variable rate. At each iteration:

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