I use many tool but could not find it. Which pagespeed tool should I use in order to get the above results ?
Yes, it's the full path to the executable/binary - I thought this was obvious (especially as the placeholder text is
pyftsubsetseems to be installed in a virtualenv, I am not sure this will work without further wiring - you would probably need a wrapper shell script to activate the virtualenv and run
pyftsubsetwithin that virtualenv.
By subsetting the font to include only those icons that are actually being used, the size of the font files and CSS can often be drastically reduced which does improve page loading time.
Typically, the size of the font files can be reduced by over 80%.
There was a time when Opera was ahead of the curve in some features (they introduced tabbed browsing first, IIRC) but, yeah, that time has kind of passed.Mine too, but some users use it persistently and do not let the browser retire. Personal headache.
Probably found a bug, please check.