Releases, technical deep dives and news about Cheerp from the Leaning Technologies engineering blog.https://labs.leaningtech.comhttps://labs.leaningtech.com/blog/internships-winter25https://labs.leaningtech.com/blog/internships-winter25Our interns reflect on their 6 month internships at Leaning Technologies Mon, 13 Apr 2026 00:00:00 GMTCheerpBrowserPodLeaning Technologieshttps://labs.leaningtech.com/blog/join-the-webvm-hackathonhttps://labs.leaningtech.com/blog/join-the-webvm-hackathonWebVM: The Hackathon is a global hybrid event open to all developers. Dive into terminal-based solutions using CheerpX and showcase your coding skills for a chance to win amazing prizes. Wed, 02 Oct 2024 00:00:00 GMTCheerpXCheerpCommunityhttps://labs.leaningtech.com/blog/modernising-legacy-cpp-mfc-applicationshttps://labs.leaningtech.com/blog/modernising-legacy-cpp-mfc-applicationsModernising C++/MFC applications into modern web applications can offer significant practical advantages and enable improved efficiency, productivity and flexibility. WebAssembly, and the Cheerp C++ to Wasm compiler offer a uniquely efficient path to achieve this, by preserving the vast majority of existing source code. Tue, 25 Jun 2024 00:00:00 GMTCheerpTechnicalhttps://labs.leaningtech.com/blog/cheerp-asanhttps://labs.leaningtech.com/blog/cheerp-asanCheerp is a powerful C/C++ to JavaScript/WASM compiler. Tue, 13 Feb 2024 00:00:00 GMTCheerpTechnicalhttps://labs.leaningtech.com/blog/cheerp-3-now-permissively-licensedhttps://labs.leaningtech.com/blog/cheerp-3-now-permissively-licensedWe are proud to announce Cheerp 3.0, the latest major release of our C++ compiler for the Web. This new version is packed with new features and optimizations that, once more, move the state of the art of using C++ as a programming language for Web applications and games. All the compiler core components and libraries are now licensed permissively under the Apache 2.0 / LLVM license, allowing for Cheerp 3.0 to be used for any purpose, with no restrictions. Tue, 14 Mar 2023 00:00:00 GMTCheerpReleasehttps://labs.leaningtech.com/blog/reducing-webassembly-size-by-exploring-all-executions-in-llvmhttps://labs.leaningtech.com/blog/reducing-webassembly-size-by-exploring-all-executions-in-llvmDiscover the "Partial Executer," an LLVM pass that optimizes WebAssembly by removing unreachable code. This article explains the technology, challenges, and benefits, ideal for those versed in LLVM basics. Thu, 10 Mar 2022 00:00:00 GMTCheerpTechnicalhttps://labs.leaningtech.com/blog/a-javascript-optimising-compilerhttps://labs.leaningtech.com/blog/a-javascript-optimising-compilerCarlo, a Leaning Technologies compiler engineer, has tried something bold. Coming up with a JavaScript to JavaScript optimizing compiler. Optimize for what metric? Performance of code execution (eg. how long does it take to calculate the n-th prime number). Wed, 12 May 2021 00:00:00 GMTCheerpTechnicalhttps://labs.leaningtech.com/blog/how-cheerp-supports-64-bit-integers-in-both-javascript-and-webassemblyhttps://labs.leaningtech.com/blog/how-cheerp-supports-64-bit-integers-in-both-javascript-and-webassemblyImproving support for 64-bit integers in Cheerp, a C/C++ to WebAssembly/JavaScript compiler. Mon, 13 Jul 2020 00:00:00 GMTCheerpTechnicalhttps://labs.leaningtech.com/blog/jsexport-c-in-the-browser-made-easyhttps://labs.leaningtech.com/blog/jsexport-c-in-the-browser-made-easyHere at Leaning Technologies we build compilers for the Web (which output a combination of JavaScript and WebAssembly). Tue, 30 Jun 2020 00:00:00 GMTCheerpTechnicalhttps://labs.leaningtech.com/blog/adding-anyref-support-in-a-c-to-webassembly-compilerhttps://labs.leaningtech.com/blog/adding-anyref-support-in-a-c-to-webassembly-compilerWebAssembly in its current MVP form is shipped by all major browsers and is already capable of amazing things. This does not mean that its development has concluded: on the contrary, there are many post-MVP feature proposals at different stages of development. Tue, 19 May 2020 00:00:00 GMTCheerpTechnicalhttps://labs.leaningtech.com/blog/control-flowhttps://labs.leaningtech.com/blog/control-flowOne of the challenges of compiling LLVM IR code to JavaScript and WebAssembly is the structured control flow problem: We have some code represented as a control flow graph (CFG), and we want to convert it into structured control flow. In this article I will describe how to do this conversion, and how to handle irreducible control flow. Thu, 11 Apr 2019 00:00:00 GMTCheerpTechnical