Most web-based software has been developed using the JavaScript language. JavaScript has significantly contributed to the activation of web software by providing a standardized runtime environment in most web browsers. Performance limitations are a problem. WebAssembly (WASM) is a platform that provides a way to run compilation-based programming languages such as C and C++ in a web browser. We present possible alternatives. The experimental results confirmed that the performance limitations that occur when the existing JavaScript is used in the process of processing large-scale contents in web software are actually very large. This study confirmed that the existing technology, which is generally widely used, had performance problems such as the experimental results, and the superiority of the proposed technology was confirmed by directly implementing and comparing WASM -based web software as an improvement measure.