Details for http://rebel.pl/

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B (80)
Current YSlow grade: B (80)
 D (67)
Current Page Speed score: D (67)

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Measurements over time

YSlow metrics
Basic measurements
B (80%)
329KB
64 0 ms
Best practices
Make fewer HTTP requests A (92%)
Use a Content Delivery Network (CDN) F (0%)
Add Expires headers F (0%)
Avoid Empty Image src A (100%)
Compress components with gzip B (89%)
Put CSS at top A (100%)
Put JavaScript at bottom B (85%)
Avoid CSS expressions A (100%)
Make JavaScript and CSS external F (0%)
Reduce DNS lookups A (95%)
Minify JavaScript and CSS B (80%)
Avoid URL redirects A (100%)
Remove duplicate JavaScript and CSS A (100%)
Configure entity tags (ETags) F (0%)
Make AJAX cacheable A (100%)
Use GET for AJAX requests A (100%)
Reduce the number of DOM elements E (59%)
Avoid HTTP 404 (Not Found) error A (100%)
Reduce cookie size A (100%)
Use cookie-free domains A (100%)
Avoid AlphaImageLoader filter A (100%)
Do not scale images in HTML B (85%)
Make favicon small and cacheable A (100%)
Page Speed metrics
Basic measurements
464KB 5789 ms
329KB 64
D (67%)
Optimize caching
Leverage browser caching F (3%)
Leverage proxy caching A (100%)
Remove query strings from static resources A (100%)
Specify a Vary: Accept-Encoding header A (98%)
Minimize round-trip times
Minimize DNS lookups n/a Minimize redirects A (100%)
Avoid bad requests A (100%)
Combine external JavaScript n/a
Combine external CSS n/a Combine images using CSS sprites F (29%)
Optimize the order of styles and scripts B (85%)
Avoid document.write n/a
Avoid CSS @import A (100%)
Prefer asynchronous resources B (85%)
Parallelize downloads across hostnames n/a
Minimize request overhead
Minimize request size A (100%)
Serve static content from a cookieless domain n/a
Minimize payload size
Enable compression B (88%)
Remove unused CSS A (95.9%)
Minify JavaScript B (88%)
Minify CSS F (31%)
Minify HTML C (70%)
Defer loading of JavaScript n/a
Optimize images B (83%)
Serve scaled images A (100%)
Serve resources from a consistent URL A (100%)
Optimize browser rendering
Use efficient CSS selectors A (97.5%)
Put CSS in the document head F (44%)
Specify image dimensions F (0%)
Specify a character set early A (100%)

YSlow measurements history (csv)

Page Speed measurements history (csv)