By default libstdc++ stopped using the pooling allocator in 2005: https://gcc.gnu.org/r106665 https://gcc.gnu.org/r106665 That's one year after the ancient, bi

By default libstdc++ stopped using the pooling allocator in 2005: https://gcc.gnu.org/r106665 https://gcc.gnu.org/r106665 That's one year after the ancient, bitrotted, unofficial copy of the libstdc++ documentation that the blog post links to, but still ancient history.