mirror of
https://github.com/jaygooby/ttfb.sh
synced 2025-12-10 16:07:22 +01:00
asciicast and gif
This commit is contained in:
Jay Caines-Gooby
21
LICENSE
21
LICENSE
@@ -1,21 +0,0 @@
|
|||||||
MIT License
|
|
||||||
|
|
||||||
Copyright (c) 2019 Jay Caines-Gooby
|
|
||||||
|
|
||||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
||||||
of this software and associated documentation files (the "Software"), to deal
|
|
||||||
in the Software without restriction, including without limitation the rights
|
|
||||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
||||||
copies of the Software, and to permit persons to whom the Software is
|
|
||||||
furnished to do so, subject to the following conditions:
|
|
||||||
|
|
||||||
The above copyright notice and this permission notice shall be included in all
|
|
||||||
copies or substantial portions of the Software.
|
|
||||||
|
|
||||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
||||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
||||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
||||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
||||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
||||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
||||||
SOFTWARE.
|
|
||||||
169
README.md
169
README.md
@@ -1,169 +0,0 @@
|
|||||||
# Introduction
|
|
||||||
|
|
||||||
Measures [time-to-first-byte](https://en.wikipedia.org/wiki/Time_to_first_byte) for single or multiple URLs. Can show you quickest, slowest & median TTFB values plus optionally log all response headers.
|
|
||||||
|
|
||||||
```
|
|
||||||
Usage: ttfb [options] url [url...]
|
|
||||||
-d debug
|
|
||||||
-l <log file> (infers -d) log response headers. Defaults to ./curl.log
|
|
||||||
-n <number> of times to test time to first byte
|
|
||||||
-v verbose output. Show response breakdown (DNS lookup, TLS handshake etc)
|
|
||||||
```
|
|
||||||
|
|
||||||
Implicitly follows a redirection chain using curl's `-L` option.
|
|
||||||
|
|
||||||
Can log all response headers (the default log file is `./curl.log`) by calling with `-d`.
|
|
||||||
|
|
||||||
Override the default log file by specifying `-l /some/file`.
|
|
||||||
|
|
||||||
Get quickest, slowest and median TTFB values by specifying the number of times to call a URL; use `-n2` for 2 tests, `-n5` for 5 and so on.
|
|
||||||
|
|
||||||
Uses the calculation `%{time_starttransfer¹} - %{time_appconnect²}` which doesn't include any connection overhead, to better approximate [devtool’s TTFB figure](https://developers.google.com/web/tools/chrome-devtools/network/understanding-resource-timing#slow_time_to_first_byte).
|
|
||||||
|
|
||||||
¹ [`time_starttransfer`](https://github.com/curl/curl/blob/e431daf013ea04cb1a988a2009d820224ef5fb79/docs/cmdline-opts/write-out.d#L141-L144)
|
|
||||||
> The time, in seconds, it took from the start until the first byte was just about to be transferred. This includes time_pretransfer and also the time the server needed to calculate the result.</blockquote>
|
|
||||||
|
|
||||||
² [`time_appconnect`](https://github.com/curl/curl/blob/e431daf013ea04cb1a988a2009d820224ef5fb79/docs/cmdline-opts/write-out.d#L118-L120)
|
|
||||||
>The time, in seconds, it took from the start until the SSL/SSH/etc
|
|
||||||
connect/handshake to the remote host was completed.
|
|
||||||
|
|
||||||
# Genesis
|
|
||||||
Based on a [gist](https://gist.github.com/sandeepraju/1f5fbdbdd89551ba7925abe2645f92b5)
|
|
||||||
by https://github.com/sandeepraju
|
|
||||||
|
|
||||||
Modified by jay@gooby.org, [@jaygooby](https://twitter.com/jaygooby)
|
|
||||||
|
|
||||||
# Usage
|
|
||||||
|
|
||||||
```
|
|
||||||
Usage: ttfb [options] url [url...]
|
|
||||||
-d debug
|
|
||||||
-l <log file> (infers -d) log response headers. Defaults to ./curl.log
|
|
||||||
-n <number> of times to test time to first byte
|
|
||||||
-v verbose output. Show response breakdown (DNS lookup, TLS handshake etc)
|
|
||||||
```
|
|
||||||
|
|
||||||
## Examples
|
|
||||||
|
|
||||||
Basic usage:
|
|
||||||
|
|
||||||
```
|
|
||||||
$ ttfb example.com
|
|
||||||
.227436
|
|
||||||
```
|
|
||||||
|
|
||||||
Basic usage with verbose response breakdown:
|
|
||||||
|
|
||||||
```
|
|
||||||
$ ttfb -v https://example.com
|
|
||||||
DNS lookup: 0.005152 TLS handshake: 0.000000 TTFB including connection: 0.200831 TTFB: .200831 Total time: 0.201132
|
|
||||||
```
|
|
||||||
|
|
||||||
Test multiple times:
|
|
||||||
|
|
||||||
```
|
|
||||||
$ ttfb -n 5 example.com/example/url
|
|
||||||
.....
|
|
||||||
fastest .177263 slowest .214302 median .179957
|
|
||||||
```
|
|
||||||
|
|
||||||
Test multiple URLs:
|
|
||||||
|
|
||||||
```
|
|
||||||
$ ttfb bbc.co.uk news.bbc.co.uk
|
|
||||||
bbc.co.uk .049985
|
|
||||||
news.bbc.co.uk .054122
|
|
||||||
```
|
|
||||||
|
|
||||||
Test multiple URLs, multiple times:
|
|
||||||
|
|
||||||
```
|
|
||||||
$ ttfb -n 5 bbc.co.uk news.bbc.co.uk
|
|
||||||
.....
|
|
||||||
.....
|
|
||||||
bbc.co.uk fastest .030936 slowest .057755 median .034663
|
|
||||||
news.bbc.co.uk fastest .031413 slowest .182791 median .035001
|
|
||||||
```
|
|
||||||
|
|
||||||
Verbose response breakdown when multiple tests specified:
|
|
||||||
|
|
||||||
```
|
|
||||||
$ ttfb -v -n 5 bbc.co.uk
|
|
||||||
DNS lookup: 0.005335 TLS handshake: 0.102314 TTFB including connection: 0.148328 TTFB: .046014 Total time: 0.646115
|
|
||||||
DNS lookup: 0.005322 TLS handshake: 0.102609 TTFB including connection: 0.150693 TTFB: .048084 Total time: 0.644611
|
|
||||||
DNS lookup: 0.004277 TLS handshake: 0.102066 TTFB including connection: 0.172199 TTFB: .070133 Total time: 1.196256
|
|
||||||
DNS lookup: 0.004444 TLS handshake: 0.107375 TTFB including connection: 0.160771 TTFB: .053396 Total time: 0.637290
|
|
||||||
DNS lookup: 0.005352 TLS handshake: 0.118882 TTFB including connection: 0.168772 TTFB: .049890 Total time: 0.653761
|
|
||||||
|
|
||||||
fastest .046014 slowest .070133 median .049890
|
|
||||||
```
|
|
||||||
|
|
||||||
Log all the response headers for multiple tests to multiple URLs:
|
|
||||||
|
|
||||||
```
|
|
||||||
ttfb -d -n 2 bbc.co.uk https://www.bbc.co.uk/weather
|
|
||||||
..
|
|
||||||
..
|
|
||||||
bbc.co.uk fastest .027550 slowest .055215 median .041382
|
|
||||||
https://www.bbc.co.uk/weather fastest .101020 slowest .297923 median .199471
|
|
||||||
|
|
||||||
$ ls *.log
|
|
||||||
bbc_co_uk-curl.log https___www_bbc_co_uk_weather-curl.log
|
|
||||||
|
|
||||||
$ cat https___www_bbc_co_uk_weather-curl.log
|
|
||||||
HTTP/2 200
|
|
||||||
server: openresty
|
|
||||||
x-cache-action: MISS
|
|
||||||
vary: Accept-Encoding,X-BBC-Edge-Cache,X-BBC-Edge-Scheme,X-CDN
|
|
||||||
x-cache-age: 0
|
|
||||||
cache-control: private, stale-while-revalidate=10, max-age=0, must-revalidate
|
|
||||||
content-type: text/html;charset=utf-8
|
|
||||||
x-mrid: w1
|
|
||||||
date: Thu, 11 Apr 2019 17:08:07 GMT
|
|
||||||
x-xss-protection: 1; mode=block
|
|
||||||
x-content-type-options: nosniff
|
|
||||||
x-lb-nocache: true
|
|
||||||
x-msig: 24e37f81323984e4e45b8048f9e3c94a
|
|
||||||
x-frame-options: SAMEORIGIN
|
|
||||||
content-length: 1077454
|
|
||||||
|
|
||||||
HTTP/2 200
|
|
||||||
server: openresty
|
|
||||||
x-cache-action: MISS
|
|
||||||
vary: Accept-Encoding,X-BBC-Edge-Cache,X-BBC-Edge-Scheme,X-CDN
|
|
||||||
x-cache-age: 0
|
|
||||||
cache-control: private, stale-while-revalidate=10, max-age=0, must-revalidate
|
|
||||||
content-type: text/html;charset=utf-8
|
|
||||||
x-mrid: w1
|
|
||||||
date: Thu, 11 Apr 2019 17:08:08 GMT
|
|
||||||
x-xss-protection: 1; mode=block
|
|
||||||
x-content-type-options: nosniff
|
|
||||||
x-lb-nocache: true
|
|
||||||
x-msig: 24e37f81323984e4e45b8048f9e3c94a
|
|
||||||
x-frame-options: SAMEORIGIN
|
|
||||||
content-length: 1077454
|
|
||||||
```
|
|
||||||
|
|
||||||
# More detail on time-to-first-byte
|
|
||||||
|
|
||||||
See https://blog.cloudflare.com/a-question-of-timing/
|
|
||||||
and https://curl.haxx.se/docs/manpage.html for an explanation
|
|
||||||
of how the curl variables relate to the various stages of
|
|
||||||
the transfer.
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
To get a better approximation of devtool's TTFB, we consider
|
|
||||||
the time without the connection overhead:
|
|
||||||
`%{time_starttransfer} - %{time_appconnect}`
|
|
||||||
|
|
||||||
Uses a dirty `eval` to do the ttfb arithmetic. Depends
|
|
||||||
on `bc` and `column` commands.
|
|
||||||
|
|
||||||
# TODO
|
|
||||||
|
|
||||||
* [x] Show progress when more than one request (`-n 2` etc) option is set
|
|
||||||
|
|
||||||
* [ ] Sort output by fastest TTFB when multiple URLs are supplied
|
|
||||||
|
|
||||||
* [ ] Colour code the `TTFB:` figure in the standard response, according to the speed of the response.
|
|
||||||
18
demo.cast
Normal file
18
demo.cast
Normal file
@@ -0,0 +1,18 @@
|
|||||||
|
{"version": 2, "width": 204, "height": 56, "timestamp": 1555020136, "env": {"SHELL": "/bin/bash", "TERM": "xterm-256color"}}
|
||||||
|
[0.706225, "o", "$ "]
|
||||||
|
[1.48203, "o", "ttfb -n"]
|
||||||
|
[1.482541, "o", "3 news.bbc.co.uk https://en.w"]
|
||||||
|
[1.482668, "o", "ikipedia"]
|
||||||
|
[1.482914, "o", ".org/wiki/Time_to"]
|
||||||
|
[1.48303, "o", "_first_by"]
|
||||||
|
[1.483113, "o", "te"]
|
||||||
|
[3.722443, "o", "\r\n"]
|
||||||
|
[4.641905, "o", "."]
|
||||||
|
[5.978201, "o", "."]
|
||||||
|
[6.739551, "o", "."]
|
||||||
|
[6.739693, "o", "\r\n"]
|
||||||
|
[7.040632, "o", "."]
|
||||||
|
[7.338501, "o", "."]
|
||||||
|
[7.623244, "o", ".\r\n"]
|
||||||
|
[7.631003, "o", "news.bbc.co.uk \u001b[32mfastest \u001b[39m.039445 \u001b[91mslowest \u001b[39m.653135 \u001b[95mmedian \u001b[39m.040998\u001b[39m\r\nhttps://en.wikipedia.org/wiki/Time_to_first_byte \u001b[32mfastest \u001b[39m.049489 \u001b[91mslowest \u001b[39m.050681 \u001b[95mmedian \u001b[39m.049572\u001b[39m\r\n"]
|
||||||
|
[7.706225, "o", "$ "]
|
||||||
Reference in New Issue
Block a user