[[["わかりやすい","easyToUnderstand","thumb-up"],["問題の解決に役立った","solvedMyProblem","thumb-up"],["その他","otherUp","thumb-up"]],[["必要な情報がない","missingTheInformationINeed","thumb-down"],["複雑すぎる / 手順が多すぎる","tooComplicatedTooManySteps","thumb-down"],["最新ではない","outOfDate","thumb-down"],["翻訳に関する問題","translationIssue","thumb-down"],["サンプル / コードに問題がある","samplesCodeIssue","thumb-down"],["その他","otherDown","thumb-down"]],["最終更新日 2025-07-25 UTC。"],[[["This documentation applies to a deprecated version of PageSpeed Insights (v4) and will be shut down soon; users should refer to the latest version (v5)."],["The primary focus of this document is to explain how enabling GZIP compression can significantly improve website performance by reducing file sizes."],["PageSpeed Insights may report compression issues due to interference from proxy servers or anti-virus software affecting the headers returned to the client."],["Modern browsers inherently support GZIP compression, so enabling it on your web server is crucial for optimization."],["This page offers guidance and links to resources on how to enable GZIP compression for various web servers like Apache, Nginx, and IIS."]]],["PageSpeed Insights flags resources served without `gzip` compression, which can reduce response size by up to 90%. Modern browsers support `gzip`, improving download time and data usage. To resolve this, enable and test `gzip` on your server, using tools like `mod_deflate` for Apache, `ngx_http_gzip_module` for Nginx, or configure HTTP compression in IIS. Proxy servers or anti-virus software can interfere with compression, impacting PageSpeed Insights' results.\n"]]