Some interesting benchmarks that were posted on the [std-proposals] mailing list. The link to the entry in the mailing list archive of [std-proposals]: https://lists.isocpp.org/std-proposals/2026/05/18441.php For comparison: For our modularized Windows app1, we see a reduction in build time for a full build from ~3 to ~2 minutes due to using "import std"2. 1Using the MSVC compiler with MSBuild. We currently have 1148 C++ source files, 558 containing "export module". We have 4223 imports, 357 of these are "import std". 2A while ago (~2 months), I made an experimental branch in our (closed) source code repository, which replaces every single "import std" with the minimally required #includes of the standard library headers. That was done in our fully modularized code base. submitted by /u/tartaruga232 [link] [comments]