We have activated the google pagespeed module in apache we server you can use .htaccess code to speed up the loading of your webiste.For example you can use following .htaccess code to decrease l oad time of website.
<IfModule pagespeed_module>
ModPagespeed on
ModPagespeedRewriteLevel CoreFilters
ModPagespeedEnableFilters add_head,remove_quotes,combine_javascript,rewrite_images,insert_dns_prefetch,defer_javascript
ModPagespeedEnableFilters rewrite_css,fallback_rewrite_css_urls
ModPagespeedEnableFilters sprite_images,collapse_whitespace,dedup_inlined_images,inline_preview_images,resize_mobile_images,rewrite_javascript,responsive_images,resize_images,convert_jpeg_to_progressive,prioritize_critical_css,trim_urls
ModPagespeedEnableFilters convert_gif_to_png,recompress_png,convert_png_to_jpeg,convert_jpeg_to_progressive,recompress_jpeg,convert_jpeg_to_webp,convert_to_webp_lossless,convert_to_webp_animated,recompress_webp
ModPagespeedEnableFilters lazyload_images
ModpagespeedLazyloadImagesAfterOnload off
ModpagespeedCriticalImagesBeaconEnabled false
ModpagespeedLazyloadImagesBlankUrl "https://www.gstatic.com/psa/static/1.gif"
ModPagespeedEnableFilters inline_google_font_css
ModPagespeedGoogleFontCssInlineMaxBytes 1024
ModPagespeedCssInlineMaxBytes 1024
ModPagespeedEnableFilters local_storage_cache
</IfModule>
To deactivate Googlepage speed please use following code in .htaccess file
<IfModule pagespeed_module>
ModPagespeed off
</IfModule>
For more information you can visit https://www.modpagespeed.com/doc/configuration