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[174.21.149.226]) by smtp.gmail.com with ESMTPSA id m2sm6290946pjl.21.2020.04.17.13.10.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 17 Apr 2020 13:10:30 -0700 (PDT) Subject: Re: 5.0.0-rc3 : Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries To: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= , Dennis Clarke , "qemu-devel@nongnu.org Developers" , qemu-ppc References: <707f641b-1cf6-15a0-0602-5950e7b98886@blastwave.org> <023af69c-d21b-55a7-cdb4-f61ff3cd50f9@amsat.org> From: Richard Henderson Message-ID: <99b34394-85a0-a270-8fac-1ae9f53b5674@linaro.org> Date: Fri, 17 Apr 2020 13:10:28 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <023af69c-d21b-55a7-cdb4-f61ff3cd50f9@amsat.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::1031 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-discuss Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 4/17/20 2:20 AM, Philippe Mathieu-Daudé wrote: > --enable-debug enables --enable-debug-tcg which is not designed for > performance. You might want to try '--enable-debug --disable-debug-tcg'. More importantly, --enable-debug turns off compiler optimization. That is going to be the biggest hit to performance. r~