Bruce Dawson had a post about how compilers (mostly MSVC) duplicate const data across files, resulting in executable bloat: https://randomascii.wordpress.com/2014/06/26/please-calculate-this-circles-circumference/ He also filed a chromium issue about what the situation looked like in Chromium: https://code.google.com/p/chromium/issues/detail?id=441988 Using MSVC's /Gw compiler switch (effectively -fdata-sections for MSVC if I understand correctly), he wound up saving ~600K across all of Chromium's major DLLs. I don't know if /Gw would help us because we compile with LTO and Chromium does not. But it's at least worth investigating.

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