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d39993a4ce
This causes significant performance issues when using large (>10meg) writes Fix by adjusting the buffer write function to clear the buffer once, rather than piece by piece, avoiding a case where a large write (in our case, around 70mbytes) will consume 100% of CPU. This takes a webrick GET request via SSL from around 200kbyts/sec and consuming 100% of a core, to line speed on gigabit ethernet and 6% cpu utlization. https://github.com/ruby/openssl/commit/d4389b425d