~/talk

Practical C++ Modules

on YouTube 01h 01m
Talkat CppCon 2019 · 2019-09-15..09-20· [c-and-cpp, compilers-and-language-design]

speaker

name:Boris Kolpackov
links:none on file

resources

video:https://youtu.be/szHV6RdQdg8
slides:none on file

summary

C++20 modules arrive with three practical migration paths: include translation, header-unit importation, or full named modules that produce a binary module interface (BMI). Measured with GCC on a six‑core laptop, turning iostream into a BMI cuts a synthetic build from about 6s to ~2s (~3× speedup). Build systems must produce and depend on BMIs (don’t distribute BMIs as a public artifact), compilers have partial, evolving support, and choose module granularity, interface/implementation units, and naming deliberately to avoid unnecessary recompilation.

AI-written summary · about

chapters (7)

  1. 0:00Introduction to C++ modules
  2. 10:40Include translation overview
  3. 21:20Header importation basics
  4. 28:28Practical module guidelines
  5. 39:50Module naming and structure
  6. 50:14When to migrate to modules
  7. 57:53State of tools and Q&A

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