回答:
これは私の.htaccessのPageSpeedセクションです。
<IfModule pagespeed_module>
ModPagespeed on
ModPagespeedEnableFilters extend_cache
ModPagespeedEnableFilters collapse_whitespace
ModPagespeedEnableFilters combine_css
ModPagespeedEnableFilters move_css_to_head
ModPagespeedEnableFilters remove_comments
ModPagespeedEnableFilters inline_css
ModPagespeedEnableFilters rewrite_javascript
ModPagespeedEnableFilters insert_img_dimensions
ModPagespeedEnableFilters rewrite_images
ModPagespeedEnableFilters rewrite_css
</IfModule>
jsおよびcss圧縮と少し重複していますが、否定的な結果は見ていません。CSSとJSを集約して圧縮するようにDrupal 7を設定しました。
ただし、サイトのトラフィックはそれほど多くありません。
ここに私のhtaccessのセットアップがあります:
# -----------------------------------------------------------------------
# Enable keep-alive for faster pagespeed:
# -----------------------------------------------------------------------
<ifModule mod_headers.c>
Header set Connection keep-alive
</ifModule>
# -----------------------------------------------------------------------
# Expire caching
# -----------------------------------------------------------------------
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType image/jpg "access plus 1 year"
ExpiresByType image/jpeg "access plus 1 year"
ExpiresByType image/gif "access plus 1 year"
ExpiresByType image/png "access plus 1 year"
ExpiresByType text/css "access plus 1 month"
ExpiresByType application/pdf "access plus 1 month"
ExpiresByType application/x-font-woff "access plus 1 year"
ExpiresByType application/x-font-woff2 "access plus 1 year"
ExpiresByType application/x-font-ttf "access plus 1 year"
ExpiresByType text/x-javascript "access plus 1 month"
ExpiresByType application/x-shockwave-flash "access plus 1 month"
ExpiresByType image/x-icon "access plus 1 year"
ExpiresDefault "access plus 2 days"
</IfModule>
# -----------------------------------------------------------------------
# Cache Headers
# -----------------------------------------------------------------------
<ifmodule mod_headers.c>
# Cache specified files for 31 days
<filesmatch "\.(ico|flv|jpg|jpeg|png|gif|css|swf)$">
Header set Cache-Control "max-age=2678400, public"
</filesmatch>
# Cache HTML files for a couple hours
<filesmatch "\.(html|htm)$">
Header set Cache-Control "max-age=7200, private, must-revalidate"
</filesmatch>
# Cache PDFs for a day
<filesmatch "\.(pdf)$">
Header set Cache-Control "max-age=86400, public"
</filesmatch>
# Cache Javascripts for 31 days
<filesmatch "\.(js)$">
Header set Cache-Control "max-age=2678400, private"
</filesmatch>
</ifmodule>
# -----------------------------------------------------------------------
# Defining MIME types to ensure the web server actually knows about them.
# -----------------------------------------------------------------------
<IfModule mod_mime.c>
AddType text/css .css
AddType application/javascript .js
AddType application/x-javascript .js
AddType text/html .html .htm
AddType text/richtext .rtf .rtx
AddType image/svg+xml .svg .svgz
AddType text/plain .txt
AddType text/xsd .xsd
AddType text/xsl .xsl
AddType text/xml .xml
AddType video/asf .asf .asx .wax .wmv .wmx
AddType video/avi .avi
AddType image/bmp .bmp
AddType application/java .class
AddType video/divx .divx
AddType application/msword .doc .docx
AddType application/x-msdownload .exe
AddType image/gif .gif
AddType application/x-gzip .gz .gzip
AddType image/x-icon .ico
AddType image/jpeg .jpg .jpeg .jpe
AddType application/vnd.ms-access .mdb
AddType audio/midi .mid .midi
AddType video/quicktime .mov .qt
AddType audio/mpeg .mp3 .m4a
AddType video/mp4 .mp4 .m4v
AddType video/mpeg .mpeg .mpg .mpe
AddType application/vnd.ms-project .mpp
AddType application/vnd.oasis.opendocument.database .odb
AddType application/vnd.oasis.opendocument.chart .odc
AddType application/vnd.oasis.opendocument.formula .odf
AddType application/vnd.oasis.opendocument.graphics .odg
AddType application/vnd.oasis.opendocument.presentation .odp
AddType application/vnd.oasis.opendocument.spreadsheet .ods
AddType application/vnd.oasis.opendocument.text .odt
AddType audio/ogg .ogg
AddType application/pdf .pdf
AddType image/png .png
AddType application/vnd.ms-powerpoint .pot .pps .ppt .pptx
AddType audio/x-realaudio .ra .ram
AddType application/x-shockwave-flash .swf
AddType application/x-tar .tar
AddType image/tiff .tif .tiff
AddType audio/wav .wav
AddType audio/wma .wma
AddType application/vnd.ms-write .wri
AddType application/vnd.ms-excel .xla .xls .xlsx .xlt .xlw
AddType application/zip .zip
AddEncoding gzip svgz
#AddEncoding gzip js
#AddEncoding gzip css
</Ifmodule>
# -----------------------------------------------------------------------
# Compressing output.
# -----------------------------------------------------------------------
<IfModule mod_deflate.c>
# Enable compression
SetOutputFilter DEFLATE
# Don't compress images
SetEnvIfNoCase Request_URI \.(?:gif|png|jpg|jpeg)$ no-gzip dont-vary
Header append Vary User-Agent env=!dont-vary
</IfModule>
# -----------------------------------------------------------------------
# PageSpeed. - TESTED with Mediacenter
# -----------------------------------------------------------------------
<IfModule pagespeed_module>
# Turn on mod_pagespeed. To completely disable mod_pagespeed, you
# can set this to "off".
ModPagespeed on
# Direct Apache to send all HTML output to the mod_pagespeed
# output handler.
AddOutputFilterByType MOD_PAGESPEED_OUTPUT_FILTER text/html
ModPagespeedLowercaseHtmlNames on
ModPagespeedEnableFilters extend_cache
ModPagespeedEnableFilters insert_dns_prefetch
ModPagespeedEnableFilters add_head
ModPagespeedEnableFilters add_instrumentation
ModPagespeedEnableFilters make_google_analytics_async
#ModPagespeedEnableFilters make_show_ads_async
ModPagespeedEnableFilters flatten_css_imports
#
# Text / HTML
#
ModPagespeedEnableFilters collapse_whitespace
ModPagespeedEnableFilters convert_meta_tags
ModPagespeedEnableFilters remove_comments
ModPagespeedEnableFilters collapse_whitespace
ModPagespeedEnableFilters elide_attributes
ModPagespeedEnableFilters trim_urls
ModPagespeedEnableFilters pedantic
#
# JavaScript
#
ModPagespeedEnableFilters combine_javascript
#ModPagespeedEnableFilters canonicalize_javascript_libraries
ModPagespeedEnableFilters rewrite_javascript
ModPagespeedEnableFilters defer_javascript
ModPagespeedEnableFilters inline_javascript
#
# CSS
#
ModPagespeedEnableFilters rewrite_css
ModPagespeedEnableFilters combine_css
ModPagespeedEnableFilters move_css_to_head
ModPagespeedEnableFilters inline_css
ModPagespeedEnableFilters inline_import_to_link
ModPagespeedEnableFilters move_css_above_scripts
#
# Images
#
ModPagespeedEnableFilters inline_preview_images
ModPagespeedEnableFilters insert_img_dimensions
ModPagespeedEnableFilters rewrite_images
ModPagespeedEnableFilters convert_gif_to_png
ModPagespeedEnableFilters recompress_images
ModPagespeedEnableFilters recompress_jpeg
ModPagespeedEnableFilters recompress_png
ModPagespeedEnableFilters convert_jpeg_to_progressive
ModPagespeedEnableFilters resize_mobile_images
ModPagespeedEnableFilters sprite_images
ModPagespeedEnableFilters lazyload_images
ModPagespeedEnableFilters local_storage_cache
ModPagespeedJpegRecompressionQuality 100
#ModPagespeedEnableFilters responsive_images
ModPagespeedEnableFilters resize_images
# Disallow problematic files:
#ModPagespeedDisallow "*/respond.js"
#ModPagespeedDisallow "*/lightbox.js*"
</IfModule>