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    <a href="/david/" title="Profil public">David&nbsp;Larlet</a> partage ses <a href="/david/blog/" title="Expériences bienveillantes">réflexions</a> et sa <a href="/david/stream/2019/" title="Pensées (dés)articulées">veille hebdomadaire</a>.
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<h1>Règles de programmation web</h1>
<time>2015-04-14</time>
<article>
  <blockquote>
<p><strong>Rule 1.</strong> You can’t tell where a program is faint to spend its time. Bottlenecks occur un surprising places, so don’t try to second guess and put in a speed hack until you’ve proven that’s where the bottleneck is.</p>
<p><strong>Rule 2.</strong> Measure. Don’t tune for speed until you’ve measured, and even then don’t unless one part of the code overwhelms the rest.</p>
<p><strong>Rule 3.</strong> Fancy algorithms are slow when n is small, and n is usually small. Fancy algorithms have big constants. Until you know that n is frequently going to be big, don’t get fancy. (Even if n does get big, use Rule 2 first.)</p>
<p><strong>Rule 4.</strong> Fancy algorithms are buggier than simple ones, and they’re much harder to implement. Use simple algorithms as well as simple data structures.</p>
<p><strong>Rule 5.</strong> Data dominates. If you’ve chosen the right data structures and organize things well, the algorithms will almost always be self-evident. Data structures, not algorithms, are central to programming.</p>
<p><cite><em><a href="http://users.ece.utexas.edu/~adnan/pike.html">Rob Pike’s 5 rules of Programming</a></em></cite></p>
</blockquote>
<p>Ces règles m’amènent à réfléchir à ce que cela pourrait donner en version web :</p>
<ul>
<li>Produisez des structures de <em>données faciles à convertir</em>. En cas de doute, utilisez HTML. Soyez votre premier ré-utilisateur.</li>
<li>Liez des <em>identifiants pérennes</em>. Les URI sont vos amis. Exploitez la force du graphe et connaissez ses faiblesses.</li>
<li><em>Mesurez vos performances.</em> En fonction des périphériques et des connexions. Comprenez HTTP.</li>
<li>Soyez réactif. <em>Le web est un medium qui évolue constamment.</em> Dans ses standards et ses pratiques.</li>
<li>Restez accessible. Les personnes et robots parcourant vos pages doivent <em>pouvoir accéder au contenu</em>. Indépendamment de leur support technologique, de leurs déficiences et de leurs préférences.</li>
</ul>
</article>


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      navigator.serviceWorker.addEventListener('controllerchange', function () {
        console.log('[ServiceWorker] Send links via controller change')
        sendLinks(selector)
      })
      navigator.serviceWorker.addEventListener('message', function (event) {
        var link = document.querySelector('a[href="' + event.data.link + '"]')
        if (event.data.status && link) {
          link.style.backgroundColor = '#2d7474'
          link.style.color = '#f0f0ea'
          
            link.setAttribute('title', 'En cache pour consultation sans connexion')
          
        }
      })
    })
  } else {
    console.warn('[ServiceWorker] No cache for old browsers.')
  }
</script>