Question: how can I get the performance data on Mac?

[Asun0204]

I want to get the performance data using specific format , but I can not find a way to get this after searching the servo docs. Can anyone give me the docs or way to get the performance data?
#22790

_category_                          _incremental?_ _iframe?_             _url_                  _mean (ms)_   _median (ms)_      _min (ms)_      _max (ms)_       _events_ 
Compositing                             N/A          N/A                  N/A                       46.3838          0.3079          0.0067        598.1235              13
Layout                                  yes          yes     https://en.wikipedia.org/wiki/          4.6356          3.1762          1.0891         30.4401              44
Layout                                  no           yes     https://en.wikipedia.org/wiki/         76.7806         76.7806         76.7806         76.7806               1
+ Style Recalc                          yes          yes     https://en.wikipedia.org/wiki/          1.8238          0.0892          0.0077         25.7095              43
+ Style Recalc                          no           yes     https://en.wikipedia.org/wiki/         70.0522         70.0522         70.0522         70.0522               1
| + Text Shaping                        yes          yes     https://en.wikipedia.org/wiki/          0.0038          0.0000          0.0000          0.0710              43
| + Text Shaping                        no           yes     https://en.wikipedia.org/wiki/          7.7747          7.7747          7.7747          7.7747               1
+ Restyle Damage Propagation            yes          yes     https://en.wikipedia.org/wiki/          0.0419          0.0390          0.0161          0.1176              44
+ Restyle Damage Propagation            no           yes     https://en.wikipedia.org/wiki/          0.0386          0.0386          0.0386          0.0386               1
+ Generated Content Resolution          yes          yes     https://en.wikipedia.org/wiki/          0.0109          0.0058          0.0028          0.0903              44
+ Generated Content Resolution          no           yes     https://en.wikipedia.org/wiki/          0.0963          0.0963          0.0963          0.0963               1
+ Float Placement Speculation           yes          yes     https://en.wikipedia.org/wiki/          0.0677          0.0605          0.0371          0.1351              44
+ Float Placement Speculation           no           yes     https://en.wikipedia.org/wiki/          0.0605          0.0605          0.0605          0.0605               1
+ Primary Layout Pass                   yes          yes     https://en.wikipedia.org/wiki/          1.2343          1.0638          0.8284          3.0515              44
+ Primary Layout Pass                   no           yes     https://en.wikipedia.org/wiki/          1.1214          1.1214          1.1214          1.1214               1
+ Store Overflow                        yes          yes     https://en.wikipedia.org/wiki/          0.1277          0.0966          0.0666          0.4189              44
+ Store Overflow                        no           yes     https://en.wikipedia.org/wiki/          0.0845          0.0845          0.0845          0.0845               1
+ Display List Construction             yes          yes     https://en.wikipedia.org/wiki/          1.1212          1.6251          0.0520          2.9724              44
+ Display List Construction             no           yes     https://en.wikipedia.org/wiki/          2.2700          2.2700          2.2700          2.2700               1
Script JS Evaluate                      no           yes     https://en.wikipedia.org/w/loa         19.8855         19.8855         19.8855         19.8855               1
Script JS Evaluate                      no           yes     https://en.wikipedia.org/w/loa          1.0181          1.0181          1.0181          1.0181               1
Script JS Evaluate                      no           yes     https://en.wikipedia.org/w/loa          1.7855          1.7855          1.7855          1.7855               1
Script JS Evaluate                      no           yes     https://en.wikipedia.org/w/loa         20.9208         20.9208         20.9208         20.9208               1
Script JS Evaluate                      no           yes     https://en.wikipedia.org/wiki/          0.3656          0.3972          0.0825          0.7271               4
Script JS Evaluate                      no           yes     https://en.wikipedia.org/wiki/          1.3255          1.3255          1.3255          1.3255               1
Script JS Evaluate                      no           yes     https://login.wikimedia.org/wi          0.2412          0.2412          0.2412          0.2412               1
Script Parse HTML                       no           yes     about:blank                             3.2905          3.2905          3.2905          3.2905               1
Script Parse HTML                       no           yes     https://en.wikipedia.org/wiki/          7.4707          2.0123          0.0003         78.4226              14
Script Parse HTML                       no           yes     https://en.wikipedia.org/wiki/          7.8471          0.0561          0.0507         23.4343               3
Time To First Paint                     no           yes     https://en.wikipedia.org/wiki/          0.0000          0.0000          0.0000          0.0000               1
Time To First Contentful Paint          no           yes     https://en.wikipedia.org/wiki/          0.0000          0.0000          0.0000          0.0000               1
Blocked at IPC Receive                  N/A          N/A                  N/A                        0.0650   

[jdm]

What sort of performance data are you looking for?

[jdm]

That output you pasted comes from -p, and you can use -p [interval] to display it every [interval] seconds, or 5 by default.

[Asun0204]

Thank you for your reply. And I get the performance data by trying ./mach run -p.

I have a few other questions.

1. What are the deffierences between the performance data that generated above method and Chrome F12 performance? Can we make a comparison directly?
2. I see that there is no output item of style sheet parse, and the item of Script Stylesheet Load exists in the source code. Is there a switch to trun the option on?
3. I am looking for the items of parse HTML, parse CSS, Style Recalc, Layout and other general evaluation index, such as TTI. I see that the output of Time To First Paint and Time To First Contentful Paint is '0', is this correct?
4. The performance of Layout and Style Recalc is higher than chrome, is this correct? About layout of servo.org, 153ms of servo and 10.6ms of chrome.