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sfblues.com screenshot

Report Summary

  • 88

    Performance

    Renders faster than
    90% of other websites

  • 56

    Accessibility

    Visual factors better than
    that of 24% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 62

    SEO

    Google-friendlier than
    23% of websites

sfblues.com

Welcome to the San Francisco Blues Festival

Page Load Speed

705 ms in total

First Response

123 ms

Resources Loaded

308 ms

Page Rendered

274 ms

sfblues.com screenshot

About Website

Visit sfblues.com now to see the best up-to-date Sf Blues content and also check out these interesting facts you probably never knew about sfblues.com

San Francisco Blues Festival: Blues music on the San Francisco bay in California. This page is the official Internet home of the San Francisco Blues Festival

Visit sfblues.com

Key Findings

We analyzed Sfblues.com page load time and found that the first response time was 123 ms and then it took 582 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.

Performance Metrics

sfblues.com performance score

88

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value0.8 s

100/100

10%

LCP (Largest Contentful Paint)

Value3.9 s

53/100

25%

SI (Speed Index)

Value0.8 s

100/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.011

100/100

15%

TTI (Time to Interactive)

Value0.9 s

100/100

10%

Network Requests Diagram

sfblues.com

123 ms

FancyZoom.js

22 ms

FancyZoomHTML.js

25 ms

left-curve.gif

33 ms

logo.gif

32 ms

Our browser made a total of 68 requests to load all elements on the main page. We found that 94% of them (64 requests) were addressed to the original Sfblues.com, 3% (2 requests) were made to Google-analytics.com and 3% (2 requests) were made to Crazyegg.com. The less responsive or slowest element that took the longest time to load (123 ms) belongs to the original domain Sfblues.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 55.5 kB (11%)

Content Size

524.3 kB

After Optimization

468.9 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Sfblues.com main page is 524.3 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 35% of websites need less resources to load. Images take 455.9 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 21.9 kB

  • Original 26.6 kB
  • After minification 23.2 kB
  • After compression 4.8 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 3.5 kB, which is 13% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 21.9 kB or 82% of the original size.

Image Optimization

-1%

Potential reduce by 2.3 kB

  • Original 455.9 kB
  • After minification 453.6 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Sf Blues images are well optimized though.

JavaScript Optimization

-75%

Potential reduce by 31.3 kB

  • Original 41.8 kB
  • After minification 27.6 kB
  • After compression 10.6 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 31.3 kB or 75% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (18%)

Requests Now

65

After Optimization

53

  • Images
  • JavaScript

The browser has sent 65 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sf Blues. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

sfblues.com

sfblues.com

123 ms

FancyZoom.js

FancyZoom.js

22 ms

FancyZoomHTML.js

FancyZoomHTML.js

25 ms

left-curve.gif

left-curve.gif

33 ms

logo.gif

logo.gif

32 ms

right-curve.gif

right-curve.gif

32 ms

small-curve.gif

small-curve.gif

33 ms

link-top.gif

link-top.gif

35 ms

link-bottom-top.gif

link-bottom-top.gif

36 ms

link-bottom.gif

link-bottom.gif

36 ms

ad-video.jpg

ad-video.jpg

37 ms

2007shirt.jpg

2007shirt.jpg

39 ms

2008poster.gif

2008poster.gif

43 ms

ad-merchandise.gif

ad-merchandise.gif

51 ms

email-banana.gif

email-banana.gif

51 ms

crowd1.jpg

crowd1.jpg

72 ms

usatoday.gif

usatoday.gif

51 ms

downbeat.gif

downbeat.gif

52 ms

crowd2.jpg

crowd2.jpg

71 ms

2008.jpg

2008.jpg

58 ms

2007.jpg

2007.jpg

57 ms

2006.jpg

2006.jpg

58 ms

2005.jpg

2005.jpg

59 ms

2004.jpg

2004.jpg

69 ms

2003.jpg

2003.jpg

71 ms

urchin.js

urchin.js

6 ms

2002.jpg

2002.jpg

70 ms

2001.jpg

2001.jpg

70 ms

2000.jpg

2000.jpg

78 ms

1999.jpg

1999.jpg

76 ms

1998.jpg

1998.jpg

80 ms

1997.jpg

1997.jpg

82 ms

1996.jpg

1996.jpg

83 ms

1995.jpg

1995.jpg

82 ms

1994.jpg

1994.jpg

88 ms

1993.jpg

1993.jpg

91 ms

1992-sm.jpg

1992-sm.jpg

92 ms

1991-sm.jpg

1991-sm.jpg

94 ms

1990-sm.jpg

1990-sm.jpg

85 ms

__utm.gif

__utm.gif

3 ms

28168.js

28168.js

6 ms

1989-sm.jpg

1989-sm.jpg

75 ms

1988-sm.jpg

1988-sm.jpg

79 ms

1987-sm.jpg

1987-sm.jpg

84 ms

1986-sm.jpg

1986-sm.jpg

82 ms

1985-sm.jpg

1985-sm.jpg

84 ms

1984-sm.jpg

1984-sm.jpg

84 ms

28168.js

28168.js

58 ms

1983-sm.jpg

1983-sm.jpg

83 ms

1982-sm.jpg

1982-sm.jpg

86 ms

1981-sm.jpg

1981-sm.jpg

89 ms

1980-sm.jpg

1980-sm.jpg

92 ms

1979-sm.jpg

1979-sm.jpg

87 ms

1978-sm.jpg

1978-sm.jpg

80 ms

1977-sm.jpg

1977-sm.jpg

80 ms

1976-sm.jpg

1976-sm.jpg

88 ms

1975-sm.jpg

1975-sm.jpg

87 ms

1974-sm.jpg

1974-sm.jpg

78 ms

1973-sm.jpg

1973-sm.jpg

81 ms

lower-left-curve.gif

lower-left-curve.gif

78 ms

lower-right-curve.gif

lower-right-curve.gif

79 ms

emptyanimborder110x150.gif

emptyanimborder110x150.gif

80 ms

zoom-spin-1.png

zoom-spin-1.png

14 ms

spacer.gif

spacer.gif

14 ms

closebox.png

closebox.png

16 ms

zoom-caption-l.png

zoom-caption-l.png

15 ms

zoom-caption-r.png

zoom-caption-r.png

19 ms

zoom-caption-fill.png

zoom-caption-fill.png

14 ms

Accessibility Review

sfblues.com accessibility score

56

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

sfblues.com best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

sfblues.com SEO score

62

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

robots.txt is not valid

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sfblues.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Sfblues.com main page’s claimed encoding is . Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

sfblues.com

Open Graph description is not detected on the main page of Sf Blues. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: