Reason it's slower is if you run both your vb4 and vb5 tests sites through the following services http://gtmetrix.com, http://www.webpagetest.org/ and https://developers.google.com/speed/pagespeed/insights you will find that your server level settings aren't optimal for leveraging browser cache (mod_expires and mod_headers), keep alives and server compression (mod_deflate) being disabled. These negative performance factors affect both vB4 and vB5 installs of yours but vB5 has greater negative impact i.e. vB5 install has up to 1.3MB extra data to load per page versus 190KB extra for vB4 when compression is disabled on your server.
These are server level configuration issues but wait for vB5 Beta 28 which will improve this as it has an updated .htaccess level config for mod_expires, mod_headers and mod_deflate which will reduce page size on default fresh vB5 Beta 28 install by as much as 57%
These are server level configuration issues but wait for vB5 Beta 28 which will improve this as it has an updated .htaccess level config for mod_expires, mod_headers and mod_deflate which will reduce page size on default fresh vB5 Beta 28 install by as much as 57%
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