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Mon, 25 Apr 2022 18:09:02 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Bart Schaefer Date: Mon, 25 Apr 2022 18:08:50 -0700 Message-ID: Subject: Re: ZSH performance regression in 5.8.1.2-test To: Jordan Patterson Cc: Zsh hackers list Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Seq: 50096 Archived-At: X-Loop: zsh-workers@zsh.org Errors-To: zsh-workers-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-workers-request@zsh.org X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: On Mon, Apr 25, 2022 at 11:26 AM Jordan Patterson wrote= : > > 'prefix/5.8.1/bin/zsh -i -c exit' ran > 9.22 =C2=B1 0.27 times faster than 'prefix/5.8.1.2-test/bin/zsh -i -c= exit' I'm curious how large is your interactive startup? I just compared 5.8.1.2-test with and without the line-buffering patch running zsh -xfic 'autoload compinit; compinit -D' 2>>(wc) and in order to get any significant difference I need to have compiled with --enable-zsh-debug --enable-zsh-mem-debug. wc gives 55727 lines / 1858616 characters of xtrace output, which ought to be enough for a reasonable comparison? Without debugging: line buffered: 0.57s user 0.31s system 100% cpu 0.883 total block read: 0.56s user 0.30s system 100% cpu 0.862 total With debugging: line buffered: 1.21s user 1.44s system 72% cpu 3.669 total block read: 0.80s user 0.93s system 100% cpu 1.720 total