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  <info>
    <link type="guide" xref="index#concepts"/>

    <credit type="author">
      <name>Linux Mint</name>
      <email>root@linuxmint.com</email>
    </credit>

    <include xmlns="http://www.w3.org/2001/XInclude" href="legal.xml"/>

    <desc>當更新會弄壞某些東西時，我們稱為「效能倒退」。</desc>
  </info>

    <title>軟體效能倒退</title>

    <p>更新可以讓你的電腦保持安全、為作業系統除去臭蟲並可能增加些新功能。</p>

    <p>Unfortunately they also sometimes introduce new issues called 'regressions'.</p>

    <p>Regressions are very common in the software industry. They're inherent to software development. Code changes can cause regressions. No matter how skilled developers are, they can't always predict every possible situation or test on every possible hardware specification.</p>

    <p>When a regression happens, it breaks something which worked well before.</p>

    <p>有時候並不要緊，但有時候影響很大。</p>

    <p>要看作業系統的哪部份受到影響、影響多大、你是否有辦法修復。</p>

    <p>像是：PDF 閱讀工具沒辦法列印了，這會造成一點困擾... 但並不會比你的網路無法連線棘手，也不會像突然無法正常開機或登入一樣糟糕。</p>

    <p>後面那個情況就非常嚴重，如果你不熟悉 Linux 就沒辦法找到問題並排除。</p>
</page>
