Rules

Available Rules

This is the list of currently available rules that are available to check against.

aft	Time until the above-the-fold stabilized. Currently only returns 0.
browser_main_memory_kb
browser_other_private_memory_kb	Child Private Working Set Size - Sum of private working sets for all browser processes excluding the main process, Measured at the end of a page test (KB).
browser_process_count	Browser Process Count - Measured at the end of a page test.
browser_working_set_kb	Working set size for the main browser process - Measured at the end of a page test (KB).
bytesIn	Total number of bytes downloaded.
bytesInDoc	The number of bytes downloaded before the Document Complete time.
bytesOut	Total number of bytes uploaded.
bytesOutDoc	The number of bytes uploaded before the Document Complete time.
cached
connections	Number of different connections for requests.
docCPUms	Doc Complete CPU Time (ms).
docCPUpct	Doc Complete CPU Utilization (%).
docTime	Document Complete Time (ms).
domContentLoadedEventEnd	Time until domContentLoadedEventEnd triggered (ms).
domContentLoadedEventStart	Time until domContentLoadedEventStart triggered (ms).
domElements	Number of DOM Elements on the document (including sub-documents in frames).
domTime	DOM Element Time (ms)
effectiveBps	Metric that calculates the bandwidth used from the first byte to the end of the load to show how efficiently a site is filling the pipe.
effectiveBpsDoc	Metric that calculates the bandwidth used from the first byte to the end of the document complete.
firstPaint	Browser-reported first paint time.
fullyLoaded	Time until page fully loaded (ms).
fullyLoadedCPUms	Fully Loaded CPU Time (ms).
fullyLoadedCPUpct	Fully Loaded CPU Utilization (%)
gzip_savings	Bytes that could be saved through Gzip compression.
gzip_total	Total size of applicable resources for Gzip compression (bytes).
image_savings	Bytes that could be saved through image optimization.
image_total	Total size of applicable resources for image compression (bytes).
lastVisualChange	Time until last visual change (ms).
loadEventEnd	Time until loadEventEnd triggered (ms).
loadEventStart	Time until loadEventStart triggered (ms).
loadTime	Load Time (ms).
minify_savings	Bytes that could be saved through minification.
minify_total	Total size of applicable resources for minification (bytes).
optimization_checked	1 if the request was checked for optimization, 0 if not.
pageSpeedVersion	Version of the Page Speed SDK that was used.
render	Time till 'Start Render' (ms).
requestsCSS	The number of CSS requests.
requestsDoc	The number of HTTP(S) requests before the Document Complete time.
requestsFlash	The number of Flash requests.
requestsFont	The number of Font requests.
requestsFull	The total number of HTTP(S) requests.
requestsHTML	The number of HTML requests.
requestsImage	The number of Image requests.
requestsJS	The number of Javascript requests.
requestsOther	The number of 'other' requests.
responses_200	The number of HTTP(S) requests that returned 200.
responses_404	The number of HTTP(S) requests that returned 404.
responses_other	The number of HTTP(S) requests that returned a response code that was not 200 / 404.
result	Result (error code).
score_cache	% of static assets that had expires headers to enable browser caching. Returns: -1 for N/A
score_cdn	% of static assets that were served from a CDN. Returns: -1 for N/A
score_combine	% of JS or CSS assets that were the only asset of that type served from a given host (more than one of that type from the same host could have been combined). Returns: -1 for N/A
score_compress	% of image objects that passed the image compression test. Returns: -1 for N/A
score_cookies	% of responses that wrote cookies NOT to the aol.com domain. Returns: -1 for N/A
score_etags	% of requests that passed the ETag header check. Returns: -1 for N/A
score_gzip	% of text or JS assets that were Gzip encoded. Returns: -1 for N/A
score_keepAlive	% of responses from servers that served more than one asset that used persistent connections. Returns: -1 for N/A
score_minify	% of HTML or JS assets that were minified (less that 10% of lines had leading/trailing whitespace or comments). Returns: -1 for N/A
score_progressive_jpeg	% of the JPEG bytes that were for progressive JPEGs. Returns: -1 for N/A
SpeedIndex	The calculated Speed Index.
titleTime	Time from the start of the operation until the title first changed (in ms).
TTFB	Time to First Byte (ms).
visualComplete	Time of the last visual change to the page (ms).