_fixest_ is a relatively new library that provides full multi-threading. The core of the package is based on optimized parallel _C++ code_ that scales well for large datasets. By default, the package uses 50% of all available threads. An argument called _nthreads_ can be added to the function to specify the number of threads to use during the computation. Note that the number of threads is not the same as the number of cores. Use the _parallel_ library to learn more. > [!info]- Last updated: September 3, 2024