Ir al contenido principal

Ralsina.Me — El sitio web de Roberto Alsina

Making my site FAST

My site is cre­at­ed us­ing a tool I start­ed and on which I have put a ton of ef­fort over the last 10 years or so, called Niko­la, which is a stat­ic site gen­er­a­tor (SS­G).

One of the sell­ing points of SS­Gs is that the pro­duced sites are fast and I have al­ways tak­en care to check, ev­ery once in a while, that my site was fast ... but not late­ly. And when I checked on Google Page­Speed In­sights I was hor­ri­fied to see it scor­ing 20 points out of 100.

So, I start­ed to see what the heck had hap­pened.

Google PageSpeed HATES Youtube

Each em­bed­ded video is seen as 4MB of block­ing things load­ing and mak­ing your page suck.

So­lu­tion: de­fer load­ing them us­ing http­s://github.­com/­group­board­/yt­de­fer

Bundling things still works

It has been years since it was promised that bundling mul­ti­ple CSS files in­to a large one or merg­ing mul­ti­ple JS files in­to a sin­gle script would not be worth it.

Well, ac­cord­ing to Page­Speed, it's still worth it. Luck­i­ly Niko­la has good sup­port for it, so I made sure EV­ERY­THING was bun­dled. That al­so in­volved get­ting some things off CDNs and in­to my as­sets fold­er:

  • pris­mjs
  • jquery

Google fonts are SLOW

Like, 400ms for two fonts. So, you can self­-host them us­ing http­s://­google-web­fonts-helper.herokuap­p.­com/­fonts


  • use font-display: swap
  • preload the fonts using something like <link rel="preload" href="/assets/fonts/pt-serif-v11-latin-regular.woff2" as="font">

Check CSS for @import

Even after bundling them, if a CSS file uses @import that will still be a separate request.

Check compression and caching

Make sure your web serv­er is do­ing the right things there.

Remove useless stuff

I was load­ing font-awe­some for ONE ICON. There, gone.

Did it work?

Now the score hov­ers around 96 to 98 so, yes it did. And in­deed the page feels very, very snap­py.

New Nikola Plugin: rst code blocks using prism.js

I have been writ­ing some of my posts us­ing Mark­down late­ly. And not even plain old Python Mark­down, but mis­a­ka which is an al­ter­na­tive im­ple­men­ta­tion based on Hoe­down

So, I no­ticed that those mark­down files had no syn­tax high­light­ing! I looked and Mis­a­ka does of­fer some­thing to "high­light things". Here is what it does:

<code class="language-python">
def f():

No class­es in the el­e­ments, no noth­ing, just a class in the code el­e­men­t! It turns out that is the rec­om­mend­ed way to in­di­cate you are show­ing code:

There is no for­mal way to in­di­cate the lan­guage of com­put­er code be­ing marked up. Au­thors who wish to mark code el­e­ments with the lan­guage used, e.g. so that syn­tax high­light­ing scripts can use the right rules, can use the class at­tribute, e.g. by adding a class pre­fixed with "lan­guage-" to the el­e­men­t.

So, I looked for how to ac­tu­al­ly dis­play those things nice­ly, and found pris­mjs.­com which looked very nice!

So nice, in­deed, that now I hat­ed how my re­Struc­tured Text Pages looked!

There­fore, I wrote a new Niko­la plug­in that re­places do­cu­til­s' code di­rec­tive and re­places it with a much sim­pler one that just tags things as code of a giv­en lan­guage and lets prism do the rest.

AFAICS it's functionally equivalent, it supports the :linenos: option, including shifted line numbers.

I doubt any­one ev­er will want to use it but hey, there it is.

Lenguajes For Dummies

  • Es­to, pero mejor ex­pli­ca­do y en In­glés: http­s://ralsi­­blog/­post­s/cre­at­ing-lan­guages-­for-­dum­mies.html
  • Py­Pars­ing: http­s://py­pars­ing-­doc­s.readthe­do­c­­est/

Episodio 42: Hacé backups!

Si, tenés que hac­er back­up­s. Si, hac­er back­ups es un em­bole. Por es­o, hace­los así co­mo te mue­stro en el video, ll­e­va 5 min­u­tos y es su­fi­ciente.

  • rdif­f-back­up: http­s://rdif­f-back­
  • Ve­r­aCryp­t: http­s://­r­acryp­­.html
  • Mi script de back­up: http­s://gist.github.­com/ralsi­na/0d294a4740cf71d­f1890c3d­c508a0f5a

Episodio 41: Serverless? Tomá serverless!

Una char­la in­for­mal de 2011 con­tan­do co­mo hac­er una apli­cación MUY SERVER­LESS. Lamentable­mente to­das mis ideas han si­do declaradas ries­gos de se­guri­dad y to­dos los browsers las pro­híben hoy en día.

Contents © 2000-2023 Roberto Alsina