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Tue, 30 Nov 2021 00:25:15 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Zach Riggle Date: Tue, 30 Nov 2021 02:25:04 -0600 Message-ID: Subject: Re: Shell startup, aliases vs. functions vs. autoloadable functions, and zcompile benefits To: Roman Perepelitsa Cc: Bart Schaefer , Zsh Users Content-Type: multipart/alternative; boundary="00000000000004deca05d1fd4ca5" X-Seq: 27397 Archived-At: X-Loop: zsh-users@zsh.org Errors-To: zsh-users-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-users-request@zsh.org X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: --00000000000004deca05d1fd4ca5 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable The only performance metric I care about is the number of milliseconds between pressing =E2=8C=98T to open a new tab, and having a shell available= to accept input. Sure, input gets buffered before the prompt shows -- but it's still what I was trying to improve. For this metric, I think "zsh -il -c exit" is a sufficient benchmark -- I have looked at zsh/zprof, and it provides some insight, but when 90% of the startup time is the "source" builtin and there's no additional granularity (source a =E2=86=92 source b =E2=86=92 source veryslow =E2=86=92 source d) = so it's not quite useful. I looked at zsh-bench when it hit HackerNews (I think?) and its feature set does not appeal to me. I don't care whether oh-my-zsh or prezto are faster, or which prompt can be the faciest 18-segment display and still have no input lag. As its benchmarks show, prezto is usually high on the "first prompt lag" and very low on "input lag". The former is what I was testing for. *Zach Riggle* On Tue, Nov 30, 2021 at 1:51 AM Roman Perepelitsa < roman.perepelitsa@gmail.com> wrote: > On Tue, Nov 30, 2021 at 3:30 AM Zach Riggle wrote: > > > > The benchmark I used > > > > $ hyperfine 'zsh -i -l "exit 0"' > > > > > > Obviously this is not the BEST benchmark [for checking shell startup > time] > > Obviously. It's the worst or at least a strong contender for the title. > > Since you care about interactive zsh performance, at least skim > through the homepage of zsh-bench. It'll save you time. > > Roman. > --00000000000004deca05d1fd4ca5 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
The only performance metric I care about is the number of = milliseconds between pressing =E2=8C=98T to open a new tab, and having a sh= ell available to accept input.=C2=A0 Sure, input gets buffered before the p= rompt shows -- but it's still what I was trying to improve.

For this metric, I think "zsh -il -c exit" is a sufficien= t=C2=A0benchmark -- I have looked at zsh/zprof, and it provides some insigh= t, but when 90% of the startup time is the "source" builtin and t= here's no additional granularity (source a =E2=86=92 source b =E2=86=92= source veryslow=C2=A0=E2=86=92 source d) so it's not quite=C2=A0useful= .

I looked at zsh-bench when it hit HackerNews (I = think?) and its feature set does not appeal to me.=C2=A0 I don't care w= hether oh-my-zsh or prezto are faster, or which prompt can be the faciest 1= 8-segment display and still have no input lag.=C2=A0 As its benchmarks show= , prezto is usually high on the "first prompt lag" and very low= =C2=A0on "input lag".=C2=A0 The former is what I was testing for.=

Zach Riggle

<= br>
On Tue,= Nov 30, 2021 at 1:51 AM Roman Perepelitsa <roman.perepelitsa@gmail.com> wrote:
On Tue, Nov 30, 2021 at 3:30 = AM Zach Riggle <zachriggle@gmail.com> wrote:
>
> The benchmark I used
>
> $ hyperfine 'zsh -i -l "exit 0"'
>
>
> Obviously this is not the BEST benchmark [for checking shell startup t= ime]

Obviously. It's the worst or at least a strong contender for the title.=

Since you care about interactive zsh performance, at least skim
through the homepage of zsh-bench. It'll save you time.

Roman.
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