Tools & Wizards About Us
yapcasia.org screenshot

Report Summary

  • 22

    Performance

    Renders faster than
    40% of other websites

  • 76

    Accessibility

    Visual factors better than
    that of 42% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

yapcasia.org

YAPC::Asia Tokyo 2015

Page Load Speed

15.1 sec in total

First Response

477 ms

Resources Loaded

13.5 sec

Page Rendered

1.1 sec

yapcasia.org screenshot

About Website

Click here to check amazing YAPC Asia content for Japan. Otherwise, check out these important facts you probably never knew about yapcasia.org

世界最大、最強！YAPC::Asia Tokyoのフィナーレ！

Visit yapcasia.org

Key Findings

We analyzed Yapcasia.org page load time and found that the first response time was 477 ms and then it took 14.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

yapcasia.org performance score

22

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.1 s

8/100

10%

LCP (Largest Contentful Paint)

Value23.4 s

0/100

25%

SI (Speed Index)

Value8.9 s

15/100

10%

TBT (Total Blocking Time)

Value1,350 ms

17/100

30%

CLS (Cumulative Layout Shift)

Value0.09

92/100

15%

TTI (Time to Interactive)

Value18.6 s

3/100

10%

Network Requests Diagram

yapcasia.org

477 ms

250 ms

style.css

470 ms

header_logo.png

521 ms

button-only.gif

365 ms

Our browser made a total of 216 requests to load all elements on the main page. We found that 44% of them (95 requests) were addressed to the original Yapcasia.org, 9% (20 requests) were made to Pbs.twimg.com and 7% (15 requests) were made to Maps.googleapis.com. The less responsive or slowest element that took the longest time to load (5.5 sec) belongs to the original domain Yapcasia.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.1 MB (21%)

Content Size

5.1 MB

After Optimization

4.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Yapcasia.org main page is 5.1 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 3.7 MB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 33.9 kB

  • Original 46.8 kB
  • After minification 46.7 kB
  • After compression 12.9 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 33.9 kB or 72% of the original size.

Image Optimization

-2%

Potential reduce by 89.4 kB

  • Original 3.7 MB
  • After minification 3.6 MB

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. YAPC Asia images are well optimized though.

JavaScript Optimization

-67%

Potential reduce by 792.7 kB

  • Original 1.2 MB
  • After minification 1.1 MB
  • After compression 381.8 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 792.7 kB or 67% of the original size.

CSS Optimization

-86%

Potential reduce by 174.3 kB

  • Original 203.2 kB
  • After minification 193.2 kB
  • After compression 29.0 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Yapcasia.org needs all CSS files to be minified and compressed as it can save up to 174.3 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 69 (33%)

Requests Now

206

After Optimization

137

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 206 CSS, Javascripts, AJAX and image requests in order to completely render the main page of YAPC Asia. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 46 to 1 for JavaScripts and from 13 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

yapcasia.org

yapcasia.org

477 ms

250 ms

style.css

style.css

470 ms

header_logo.png

header_logo.png

521 ms

button-only.gif

button-only.gif

365 ms

place

place

362 ms

jquery.min.js

jquery.min.js

45 ms

jquery.cookie.js

jquery.cookie.js

561 ms

jquery.easing.1.3.js

jquery.easing.1.3.js

527 ms

functions.js

functions.js

555 ms

vue.min.js

vue.min.js

949 ms

subscription.js

subscription.js

927 ms

bradfitz.jpg

bradfitz.jpg

1221 ms

matz.jpg

matz.jpg

1323 ms

face_Larry_Wall.jpg

face_Larry_Wall.jpg

1246 ms

rjbs-pumpkin.jpg

rjbs-pumpkin.jpg

1251 ms

jnthn.jpg

jnthn.jpg

1619 ms

kelsey-hightower.jpg

kelsey-hightower.jpg

1687 ms

bhuga.jpg

bhuga.jpg

2019 ms

caseywest.jpg

caseywest.jpg

1723 ms

js

js

47 ms

init_embed.js

init_embed.js

33 ms

common.css

common.css

1270 ms

foundation.css

foundation.css

2089 ms

fonts.css

fonts.css

1876 ms

html.css

html.css

1932 ms

widgets.js

widgets.js

71 ms

header_base.png

header_base.png

506 ms

header_flame.png

header_flame.png

598 ms

section_end.png

section_end.png

517 ms

section_title_icon.png

section_title_icon.png

544 ms

jpa.jpg

jpa.jpg

802 ms

akatsuki.jpg

akatsuki.jpg

803 ms

omoroki.jpg

omoroki.jpg

1225 ms

gaiax.jpg

gaiax.jpg

1312 ms

gree.jpg

gree.jpg

1076 ms

dena.jpg

dena.jpg

1292 ms

hatena.jpg

hatena.jpg

1073 ms

pixiv.jpg

pixiv.jpg

1558 ms

freakout.jpg

freakout.jpg

1539 ms

mixi.jpg

mixi.jpg

1341 ms

mercari.jpg

mercari.jpg

2236 ms

line.jpg

line.jpg

1561 ms

livesense.jpg

livesense.jpg

2029 ms

allied_architects.jpg

allied_architects.jpg

2102 ms

s2_factory.jpg

s2_factory.jpg

2245 ms

en_japan.jpg

en_japan.jpg

2364 ms

google.jpg

google.jpg

2317 ms

clubt.jpg

clubt.jpg

2788 ms

github.jpg

github.jpg

2861 ms

skyarc.jpg

skyarc.jpg

2998 ms

neko_toast_lab.jpg

neko_toast_lab.jpg

3267 ms

farmnote.jpg

farmnote.jpg

3018 ms

microsoft.jpg

microsoft.jpg

3062 ms

mobile_factory.jpg

mobile_factory.jpg

3829 ms

wano.jpg

wano.jpg

3577 ms

adways.jpg

adways.jpg

3770 ms

at-type.jpg

at-type.jpg

3782 ms

ssri.jpg

ssri.jpg

3539 ms

hde.jpg

hde.jpg

4028 ms

epoch.jpg

epoch.jpg

4258 ms

kaizen_platform.jpg

kaizen_platform.jpg

4314 ms

kayac.jpg

kayac.jpg

4179 ms

bookmark_button.js

bookmark_button.js

212 ms

plugins.js

plugins.js

384 ms

sdk.js

sdk.js

104 ms

plusone.js

plusone.js

104 ms

analytics.js

analytics.js

32 ms

timeline.d11f7a3b3287fb94220e8ee6d03cc772.js

timeline.d11f7a3b3287fb94220e8ee6d03cc772.js

104 ms

button.0308b81ff1714e446f674b5b9793f2cd.js

button.0308b81ff1714e446f674b5b9793f2cd.js

165 ms

common.js

common.js

55 ms

map.js

map.js

98 ms

google4.png

google4.png

128 ms

overlay.js

overlay.js

67 ms

collect

collect

58 ms

util.js

util.js

140 ms

onion.js

onion.js

140 ms

search_impl.js

search_impl.js

140 ms

StaticMapService.GetMapImage

StaticMapService.GetMapImage

241 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

95 ms

cb=gapi.loaded_1

cb=gapi.loaded_1

153 ms

fastbutton

fastbutton

249 ms

299 ms

stats.js

stats.js

64 ms

openhand_8_8.cur

openhand_8_8.cur

39 ms

xd_arbiter.php

xd_arbiter.php

180 ms

xd_arbiter.php

xd_arbiter.php

259 ms

ViewportInfoService.GetViewportInfo

ViewportInfoService.GetViewportInfo

179 ms

ViewportInfoService.GetViewportInfo

ViewportInfoService.GetViewportInfo

90 ms

kh

kh

186 ms

transparent.png

transparent.png

87 ms

syndication

syndication

256 ms

563225492065509376

563225492065509376

426 ms

tweet_button.b9740740e0bcf9b0657c5b11bd4388da.ja.html

tweet_button.b9740740e0bcf9b0657c5b11bd4388da.ja.html

60 ms

293 ms

controls.js

controls.js

45 ms

postmessageRelay

postmessageRelay

168 ms

ViewportInfoService.GetViewportInfo

ViewportInfoService.GetViewportInfo

78 ms

css

css

172 ms

entity11.png

entity11.png

112 ms

mapcnt6.png

mapcnt6.png

91 ms

sv5.png

sv5.png

121 ms

tmapctrl.png

tmapctrl.png

114 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

60 ms

cb=gapi.loaded_1

cb=gapi.loaded_1

58 ms

W5F8_SL0XFawnjxHGsZjJA.ttf

W5F8_SL0XFawnjxHGsZjJA.ttf

108 ms

vt

vt

124 ms

vt

vt

127 ms

vt

vt

93 ms

vt

vt

114 ms

vt

vt

87 ms

vt

vt

103 ms

vt

vt

123 ms

vt

vt

143 ms

vt

vt

132 ms

vt

vt

165 ms

vt

vt

144 ms

vt

vt

138 ms

vt

vt

140 ms

Aachen-Bold.woff

Aachen-Bold.woff

3758 ms

mplus-1p-black.woff

mplus-1p-black.woff

5463 ms

3193398744-postmessagerelay.js

3193398744-postmessagerelay.js

49 ms

rpc:shindig_random.js

rpc:shindig_random.js

47 ms

icomoon.woff

icomoon.woff

4902 ms

zN7GBFwfMP4uA6AR0HCoLQ.ttf

zN7GBFwfMP4uA6AR0HCoLQ.ttf

9 ms

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

20 ms

Hgo13k-tfSpn0qi1SFdUfaCWcynf_cDxXwCLxiixG1c.ttf

Hgo13k-tfSpn0qi1SFdUfaCWcynf_cDxXwCLxiixG1c.ttf

26 ms

d-6IYplOFocCacKzxwXSOKCWcynf_cDxXwCLxiixG1c.ttf

d-6IYplOFocCacKzxwXSOKCWcynf_cDxXwCLxiixG1c.ttf

30 ms

reset.css

reset.css

23 ms

entry-button.css

entry-button.css

23 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

22 ms

qiita.jpg

qiita.jpg

4430 ms

bbtn-l_v3.png

bbtn-l_v3.png

14 ms

AuthenticationService.Authenticate

AuthenticationService.Authenticate

15 ms

proxy.jpg

proxy.jpg

157 ms

proxy.jpg

proxy.jpg

154 ms

proxy.jpg

proxy.jpg

167 ms

timeline.47ab5d19e8ed22531abcf4f86f3ae53a.light.ltr.css

timeline.47ab5d19e8ed22531abcf4f86f3ae53a.light.ltr.css

16 ms

timeline.47ab5d19e8ed22531abcf4f86f3ae53a.light.ltr.css

timeline.47ab5d19e8ed22531abcf4f86f3ae53a.light.ltr.css

34 ms

oHpJdZiT_normal.jpg

oHpJdZiT_normal.jpg

159 ms

default_profile_2_normal.png

default_profile_2_normal.png

157 ms

3-OkrAZV_normal.png

3-OkrAZV_normal.png

154 ms

9587b46f67b940a1715788477b128f0b_normal.jpeg

9587b46f67b940a1715788477b128f0b_normal.jpeg

152 ms

lnXrP3cD_normal.jpg

lnXrP3cD_normal.jpg

153 ms

iY7_LM3e_normal.jpg

iY7_LM3e_normal.jpg

189 ms

udhkFIQs_normal.jpeg

udhkFIQs_normal.jpeg

187 ms

T43hSBNd_normal.jpg

T43hSBNd_normal.jpg

211 ms

3o5-fg5O_normal.jpg

3o5-fg5O_normal.jpg

198 ms

fwQfcXsn_normal.jpeg

fwQfcXsn_normal.jpeg

158 ms

BN_KHXLW_normal.png

BN_KHXLW_normal.png

158 ms

8f6dca8af6cb1985b21b02e989da2289_normal.jpeg

8f6dca8af6cb1985b21b02e989da2289_normal.jpeg

158 ms

qDFu8A8Q_normal.jpg

qDFu8A8Q_normal.jpg

203 ms

b27a76d9ffc36ab855246f2684038651_normal.jpeg

b27a76d9ffc36ab855246f2684038651_normal.jpeg

191 ms

IIHS-deS_normal.png

IIHS-deS_normal.png

185 ms

2Ieb2U3Y_normal.jpeg

2Ieb2U3Y_normal.jpeg

187 ms

4ad14142-2e66-47c0-b19f-a218255f3af5_normal.jpg

4ad14142-2e66-47c0-b19f-a218255f3af5_normal.jpg

187 ms

avatar_normal.JPEG

avatar_normal.JPEG

188 ms

1SFJhyGX_normal.png

1SFJhyGX_normal.png

189 ms

n1xcepnc_normal.jpg

n1xcepnc_normal.jpg

190 ms

CdLIKUBUMAAIR3O.jpg

CdLIKUBUMAAIR3O.jpg

230 ms

syndication_bundle_v1_64fcb3dd2f6da5b5f976d91a319ef73e329c1a5d.css

syndication_bundle_v1_64fcb3dd2f6da5b5f976d91a319ef73e329c1a5d.css

145 ms

syndication_bundle_v1_64fcb3dd2f6da5b5f976d91a319ef73e329c1a5d.css

syndication_bundle_v1_64fcb3dd2f6da5b5f976d91a319ef73e329c1a5d.css

144 ms

catchball21.jpg

catchball21.jpg

3716 ms

gunosy.jpg

gunosy.jpg

3923 ms

proxy.jpg

proxy.jpg

17 ms

proxy.jpg

proxy.jpg

28 ms

kmc.jpg

kmc.jpg

3740 ms

gmo-pepabo.jpg

gmo-pepabo.jpg

4216 ms

jig-saw.jpg

jig-saw.jpg

4254 ms

jot.html

jot.html

2 ms

seesaa.jpg

seesaa.jpg

4229 ms

sixapart.jpg

sixapart.jpg

4516 ms

shanon.jpg

shanon.jpg

4456 ms

speee.jpg

speee.jpg

4639 ms

diverse.jpg

diverse.jpg

4391 ms

digitalcom.jpg

digitalcom.jpg

4754 ms

teratail.jpg

teratail.jpg

4467 ms

peatix.jpg

peatix.jpg

4432 ms

fablic.jpg

fablic.jpg

4181 ms

fiilse.jpg

fiilse.jpg

4246 ms

fusic.jpg

fusic.jpg

4879 ms

voyage_group.jpg

voyage_group.jpg

4711 ms

levtech.jpg

levtech.jpg

3866 ms

yoyo.jpg

yoyo.jpg

4346 ms

wadit.jpg

wadit.jpg

4209 ms

wondershake.jpg

wondershake.jpg

3774 ms

engineer-type.jpg

engineer-type.jpg

4425 ms

gihyo.jpg

gihyo.jpg

4334 ms

career_hack.jpg

career_hack.jpg

4229 ms

togetter.jpg

togetter.jpg

4408 ms

kyt.jpg

kyt.jpg

4444 ms

conbu.jpg

conbu.jpg

3940 ms

juniper_networks.jpg

juniper_networks.jpg

4452 ms

dmm_labo.jpg

dmm_labo.jpg

4263 ms

footer_logo.png

footer_logo.png

4021 ms

btn_twitter.png

btn_twitter.png

4027 ms

btn_facebook.png

btn_facebook.png

4190 ms

btn_youtube.png

btn_youtube.png

4397 ms

btn_30days.png

btn_30days.png

4232 ms

QuotaService.RecordEvent

QuotaService.RecordEvent

13 ms

favorite.pl

favorite.pl

345 ms

like.php

like.php

164 ms

qeKvIRsJabD.js

qeKvIRsJabD.js

141 ms

LVx-xkvaJ0b.png

LVx-xkvaJ0b.png

153 ms

mixi_check_entry.css

mixi_check_entry.css

10 ms

errorreport.production.js

errorreport.production.js

295 ms

json.js

json.js

296 ms

underscore-string-1.3.3-2.0.0-compress.js

underscore-string-1.3.3-2.0.0-compress.js

299 ms

namespace-brook-compress.js

namespace-brook-compress.js

304 ms

prototype-effects-1.6.1-1.8.3-compress.js

prototype-effects-1.6.1-1.8.3-compress.js

449 ms

mixi.js

mixi.js

306 ms

favorite.production.js

favorite.production.js

585 ms

jquery-1.7.1.min-noconflict-compress.js

jquery-1.7.1.min-noconflict-compress.js

746 ms

comment001.gif

comment001.gif

4 ms

favorite_button004.png

favorite_button004.png

308 ms

comment_content_top001.gif

comment_content_top001.gif

5 ms

Accessibility Review

yapcasia.org accessibility score

76

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.

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

yapcasia.org best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

yapcasia.org SEO score

82

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    JA

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Yapcasia.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it does not match the claimed Japanese language. Our system also found out that Yapcasia.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

yapcasia.org

Open Graph data is detected on the main page of YAPC Asia. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: