The art of tuning a website to deliver it's content quickly and efficiently to the user over a potentially low bandwidth connection.

learn more… | top users | synonyms (1)

2
votes
1answer
256 views

Does the load time of an XML sitemap matter?

I have a dynamic sitemap that will change on a daily basis. Because I'm hosting on Heroku, I'm having some difficulty getting it to persist. I'm considering having the sitemap generate on request, ...
2
votes
1answer
87 views

Server comparisons - Comparing servers based on their specs

We are busy creating a server hierarchy manager (possibly not the greatest name). What this is intended to do is determine which of our servers is the best for doing work. We have identified the ...
2
votes
0answers
84 views

How to make sure that my web application would be stable? [duplicate]

Possible Duplicate: How do you load test your application? Hi, I have finished 95% of my web application. Now, I would like to make sure that the website is stable even with 5000 or more ...
2
votes
3answers
407 views

When do browsers clear cache and how can I make more use of 304 responses?

I have a website with some some content which changes frequently. I would like to benefit from good caching when this doesn't change (so would ideally use a longer Cache-Control header), but would ...
1
vote
3answers
2k views

Confused about missing width and/or height attributes

So I tested my site on https://gtmetrix.com and it said: The following image(s) are missing width and/or height attributes. I'm confused by this, because the images itself already have the correct ...
1
vote
3answers
1k views

“High response time” warnings in Google Webmaster Tools

In my Google Webmaster Tools account, there are warnings about my site. Some URLs listed in this sitemap have a high response time. This may indicate a problem with your server or with the content ...
1
vote
3answers
81 views

What type of websites shouldn't use a cache?

Is there ever a time when you should use caching? Like for frequently updated pages? Or, should you always cache? Please give examples and reason?
1
vote
3answers
264 views

InstantClick effect on SEO?

InstantClick.io is a pretty awesome JS library that makes a website feel a lot faster (in most cases) by prefetching links when a user is hovering above them. This will cut off at least about 100ms ...
1
vote
2answers
627 views

web page performance testing in Internet Explorer

How can I get the web page load speed and data amount in Internet Explorer? I know about PageSpeed and Firebug for Firefox, is there an equivalent of those tools for IE?
1
vote
3answers
68 views

Best practice how to specifiy the link's destination

In my website, I have many files such contact.php, about.html etc. Right now I can call those file in my site by two methods. Method 1: <a href="http://www.example.com/contact.php">Contact&...
1
vote
1answer
66 views

Why is this mobile/image Googlebot crawl rate so fast? (10-30 req per sec)

This morning in logs I noticed a user got rate limited by our throttler 3 times within 1 second (429 too many requests error) at 3:30:11 AM EST: Mozilla/5.0 (Linux; Android 6.0; GCE x86 phone Build/...
1
vote
2answers
49 views

Is there a performance difference between background-size:cover and background-size:100% auto?

I know what the difference is between background-size: cover and background-size: 100% auto. I'm curious if there is a performance difference between the two and which one would be preferred?
1
vote
2answers
1k views

Google Pagespeed not recognizing minify, cache leveraging, etc

Recently, my sites score completely dropped in site optimization/speed in the Google Adsense rating system. When using Google PageSpeed Insights it tells me quite a few things. One being to leverage ...
1
vote
1answer
217 views

Do or can robots cause considerable performance issues?

At work we are in a discussion with team members who seem to think bots will cause us problems relating to performance when running on our services website. Our setup: Lets say I have site www.mysite....
1
vote
3answers
101 views

If my web application is under a server will it perform better than if it is under a shared hosting?

Assuming that I have build an application using PHP, let's say something like vBulletin or assume that I will install the vBulletin itself. Will it performs better if it is in a VPS rather than a ...
1
vote
3answers
84 views

Is it better for SEO to use margin or padding around images?

I'm trying to style the distance of text around images and I've experimented with margin and padding. For testing purposes I tried 100px around images and what I have seen is that with padding the ...
1
vote
1answer
72 views

Javascript page load time calculation returns negative

<script type="text/javascript">//<![CDATA[ // jQuery has already been loaded but this could be equivalent to // a function in <body onLoad=""> $(function(){ var iNavStart=performance....
1
vote
1answer
85 views

Many requests in my logs to the same obscure page from Opera Mini. What can be the explanation?

I checked my site's logs and I found 20 thousand requests on the same day all to an obscure page of my site. The IP address of the requests belong to Opera Mini. Can someone explain this? I would be ...
1
vote
3answers
146 views

How to test the speed of my server inet connection?

The connection speed our webapp is showing (from my office) is much slower than my connection speed to a SpeedTest.net site in the same city. I can test my internet using SpeedTest.net to Houston (...
1
vote
2answers
1k views

Looking for WAMP/LAMP/MAMP Benchmarking

I'm running ZWAMP WAMP stack on my local development machine. However I have found it to be very slow at serving pages from a Drupal site I have setup. By contrast, my live production site on shared ...
1
vote
2answers
451 views

wordpress sites are slow on shared hosting but plain html/css sites are fast

I've got a shared hosting account, unlimited sites, unlimited GB, unlimited bandwidth etc etc. Of course because it's shared and a cheap one at that - there's too many sites on each server and it ...
1
vote
1answer
997 views

HTML compressor/minifier

Currently I am using a system where HTML gets cached server-side before it's sent to the browser. I'm looking to compress the HTML source of my website before it is cached. Basically I'm looking for ...
1
vote
1answer
2k views

How to find the Fastest DNS servers to host our domain?

The question was born because lately we've seen a pretty odd (well, at least for us, for the first time) - error message in Google webmaster tools - "DNS lookup timeout" ... I was pretty sure that ...
1
vote
1answer
247 views

Critique of SEO of this HTML [closed]

I'm designing a new site which I want to be as SEO friendly as possible, fast and responsive, semantic and very accessible. A lot of these things, embarrassingly are quite new to me. Have I miss ...
1
vote
2answers
61 views

Putting CSS/JS in header for faster load times

I've been reading many articles lately about SEO on load times. Trying to get the perfect load time can be quite time-consuming but also a good feeling when you see your site loading twice as quick. ...
1
vote
1answer
33 views

Why do website speed testers show different page sizes each time I run the test?

I'm using tools.pingdom.com for a website page speed tester which returns 4 metrics (Perf score, Requests, Load time and Page Size). I understand that servers may be under varying loads and ...
1
vote
2answers
48 views

What is an appropriate total page size for a homepage, including full-screen background images so that they load fast but don't look blurry?

I am in a dilemma. My customer wants to put several nice pictures as a background on Homepage, each of them being 1200 x 650 and sized about 1.5MB. I tried to compress them to a reasonable size at ...
1
vote
1answer
23 views

Is a .htaccess rewrite rule a potential performance issue?

I use a .htaccess rewrite to redirect: RewriteEngine on RewriteBase / RewriteCond %{REQUEST_URI} !^/redirect-to-this-subfolder/ RewriteCond %{HTTP_HOST} ^(www\.)?domain-to-redirect-to-subfolder-of-...
1
vote
1answer
20 views

Do any important SEO robots (such as search engine crawlers) rely on IP addresses anymore to identify websites?

Currently, I have it where anyone who attempts to access my server IP address as a website (example: http://nnn.nnn.nnn.nnn) will be redirected to a domain name with the original request URI appended. ...
1
vote
1answer
37 views

Is webpagetest.org unreliable with mobile testing? I'm trying to get accurate results

I use webpagetest.org to test my website very often. When I used a couple of remote desktop computers on their site, my TTFB (time to first byte) measures between 1 and 400ms. However, on nearly all ...
1
vote
1answer
24 views

Can a later DocumentRoot directive override an earlier DocumentRoot directive?

Because I use cPanel, the WHM developers are trying to restrict my subdomain creation to any folder within my user account of /home/username. In order to improve processing speed, I created a ram ...
1
vote
1answer
23 views

Streaming Vs Downloading Site Load Speed debate

We have a number of sites that use bg video - currently the video file (1.4mb) is loaded from the server and increases page load. My question is whether streaming the video on loop via Vimeo or ...
1
vote
1answer
38 views

Forcing website icon to load early in all web browsers

My goal is to allow a small keepalive timeout (of about 3 seconds) with a max of about 5 requests, just enough for the page HTML, page assets, and the page icon. So far, every browser loads nearly all ...
1
vote
1answer
42 views

Full Boostrap from CDN vs custom version from own server

The last few versions of Twitter Bootstap can be customized to include only the components you need. The full version, with all the components, can be served from a wide variety of public CDNs (...
1
vote
1answer
39 views

What are the performance implications of loading static files as links vs. sending everything (including static files) inline

I was wondering what would be faster: Loading Static Files vs. Sending everything (including static files) in one HTML file? For example if I had a page that needs: jQuery font awesome CSS I ...
1
vote
1answer
1k views

Can .htaccess be used to cache AdSense JavaScript to improve the pagespeed score?

I'm AdSense publisher and I need to improve the page speed score for my site. It already gets 90/100 for speed and 100/100 for User Experience, however Google AdSense code is preventing it from ...
1
vote
1answer
186 views

Why does bingbot access my sites the most even if I set crawl rate to the minmum?

Recently my sites got overloaded and it turned out bingbot was the culprit. I set the crawl rate for the minimum for my sites in bing webmaster tools, but regardless bingbot has the most access (about ...
1
vote
2answers
63 views

How do I pick a host with the fastest access to a third party API?

I'm developing an application that relies on an API that is very time-sensitive. Every millisecond advantage I have over my competitors the better. Is there a good way to determine the optimal ...
1
vote
1answer
37 views

What kind of increase can I expect from improving site speed

I have a pretty slow site. This is what WMT measured: Now I know speed is a factor in SEO, but considering it is very difficult to make the site faster, I'm trying to evaluate the ROI of this effort. ...
1
vote
1answer
261 views

Using a CDN for CMS software (multiple sites)

I'm currently researching ideas for the media management side of a CMS I'm writing. I was looking at having images served from a CDN which is fine on a single site, but I want all sites that run the ...
1
vote
2answers
310 views

Benchmark for website speed optimization

I working on website speed optimization. I mostly used 3 tools for analyzing speed of optimization. Speed analyzing Tools: Google pagespeed tool Yslow Firefox extenstion Web Page Performance Test ...
1
vote
1answer
302 views

Does just-ping determine a website's accessibility and/or speed?

While looking for a webhost I wanted one that had good connectivity around the world, and ran their (shared hosting) test IPs on just-ping.com. This is a part of a sample result: München, Germany: ...
1
vote
1answer
166 views

Question about web hosting speed

I started using a VPS with HostGator not long ago, they have 9 levels of VPS and I started out with level 3. I'm testing a page on the website and it doesn't take too long to load, something like 2 ...
1
vote
1answer
101 views

testing random pages for uptime (part of an SLA)

We have outsourced hosting of a large website. We have an SLA for response times of random pages. I.e. every minute a random page will be chosen from a pool of 30,000 pages and its response time ...
1
vote
0answers
13 views

Some animated Adsense ads prevent the rest of the page from functioning

I've had this problem for the best part of 3 months now. Since doing a major update in March, some recurring ads make the site unusable. I've requested help on this issue multiple times but nobody has ...
1
vote
0answers
22 views

Will deleting font files make my website run faster even if it causes multiple (and more) zero byte requests for the missing files?

I have a file that is part of my website template with a size of 55.8 kb. I want to lean down my website and make it run faster. I can prevent that file from loading by deleting it. When that happens,...
1
vote
0answers
51 views

Can images be combined using the clip CSS Property while still maintaining image SEO and semantics?

I have two images in my web page. Actually there are 20 but I want to keep things simple: <div> <img src="apple.png" alt="Apple" /> <img src="orange.png" alt="Orange" /> &...
1
vote
0answers
26 views

Using SetEnvIf to not log overly accessed URLs

I'm trying to figure out how to craft my SetEnvIf's in my apache config so that the server hard disk isn't spinning 24/7 over log entries. What I want to do is disable logging for all domains and ...
1
vote
0answers
22 views

Why is my httpd so busy? [closed]

I have a simple Wordpress site on a VPS that isn't performing well. AWStats says: ~ 500k page views per month: ~ 50-80k unique visitors per month ~ 500-800 GB bandwidth per month (...
1
vote
0answers
16 views

Page speed performing poorly specifically on OS X versions of Chrome. What gives?

I'm digging into page speed within my Google Analytics, and saw that I'm having higher than average load times with Chrome, which was unexpected. Digging in further by operating system, the issue ...