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  • Strategies for very fast delivery of webpages.

    - by Cherian
    I run a website Cucumbertown with an initial pay load of nearly 9KB zipped. All my js is delayed loaded with requirejs and modernizer is the only exception. Now all my webpages are Nginx cached and only 10-15% hits go to the backend proxy. And the cache is invalidated by logged in users as proxy_cache_bypass. So for an anonymous user its nearly always a cache hit. I have some basic OS tuning with default via ip dev eth0 initcwnd 15 net.ipv4.tcp_slow_start_after_idle 0 Despite an all cache & large initcwnd my pages still take 2.5 – 3 seconds. I have a yslow score of And page speed at Are there strategies that can help deliver webpages even faster than this? Deliver pages at 1+ second time for 10KB payload? Notes: My servers run of a fairly good data center from Linode at Fremont.

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  • What could be causing this long waiting time on page load?

    - by Andrew Findlay
    What could be causing a 1.18s wait time when my page loads? Just to make sure I did not have any conflicting or parallel scripts loading, I completely deleted all the script on my home page and ran the speed test again. Although I had a blank website and 5kb file size, there was still a 900ms "waiting" time. I'm wondering if it could be my server? Any other thoughts or suggestions as it doesn't seem to be scripts. EDIT - Just ran a DNS test on pingdom and here are my results. Does this tell me anything? No nameservers found at child?

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  • Are there well-known examples of web products that were killed by slow service?

    - by Jeremy Wadhams
    It's a basic tenet of UX design that users prefer fast pages. http://www.useit.com/alertbox/response-times.html http://www.nytimes.com/2012/03/01/technology/impatient-web-users-flee-slow-loading-sites.html?pagewanted=all It's supposedly even baked into Google's ranking algorithm now: fast sites rank higher, all else being equal. But are there well known examples of web services where the popular narrative is "it was great, but it was so slow people took their money elsewhere"? I can pretty easily think of example problems with scale (Twitter's fail whale) or reliability (Netflix and Pinterest outages caused by a single datacenter in a storm). But can (lack of) speed really kill?

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  • http requests, using sprites and file sizes -

    - by crazy sarah
    Hi all I'm in the process of finding out all about sprites and how they can speed up your pages. So I've used spriteMe to create a overall sprite image which is 130kb, this is made up of 14 images with a combined total size of about 65kb So is it better to have one http request and a file size of 130kb or 14 requests for a total of 65kb? Also there is a detailed image which has been put into the spite which caused it's size to go up by about 60kb odd, this used to be a seperate jpg image which was only 30kb. Would I be better off having it seperate and suffering the additional request?

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  • What's an acceptable "Avg. Page Load Time"?

    - by hawbsl
    Is there any industry rule of thumb for what's considered an unacceptable load time v. an OK one v. a blistering fast one? We're just reviewing some Google Analytics data and getting 0.74 Avg. Page Load Time reported. I guess that's OK. However it would be good if some meatier comparison data were available, or a blog post, or somewhere where there's some analysis of what speeds are generally being achieved by various kinds of sites. Any useful links to help someone interpret these speeds? If you Google it you just get a lot of results dealing with how to improve your speed. We're not at that stage yet.

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  • How to interpret Google's "Avg. Page Load Time"?

    - by hawbsl
    Is there any industry rule of thumb for what's considered an unacceptable load time v. an OK one v. a blistering fast one? We're just reviewing some Google Analytics data and getting 0.74 Avg. Page Load Time reported. I guess that's OK. However it would be good if some meatier comparison data were available, or a blog post, or somewhere where there's some analysis of what speeds are generally being achieved by various kinds of sites. Any useful links to help someone interpret these speeds? If you Google it you just get a lot of results dealing with how to improve your speed. We're not at that stage yet.

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  • Why android app does not recognize GPRS, WiFi upon changing data connection

    - by Maxood
    If i turn off WiFi, i’m not able to open the app ( this is with no data connection, even without data connection it should display cached items ) If i tun off WiFi and turn on GPRS the app cannot recognize this and gives the error page no Wifi/GPRS connection. if i restart the phone with GPRS on the app works fine till i change data connection type. if i restart the phone with WiFi on the app works fine till i change the data connection type. whenever i change the data connection type i have to restart the phone so the app can recognize the connection type. Why my android app does not recognize WiFi, GPRS upon changing data connection in real time?

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  • php pdo connection scope

    - by Scarface
    Hey guys I have a connection class I found for pdo. I am calling the connection method on the page that the file is included on. The problem is that within functions the $conn variable is not defined even though I stated the method was public (bare with me I am very new to OOP), and I was wondering if anyone had an elegant solution other then using global in every function. Any suggestions are greatly appreciated. CONNECTION class PDOConnectionFactory{ // receives the connection public $con = null; // swich database? public $dbType = "mysql"; // connection parameters // when it will not be necessary leaves blank only with the double quotations marks "" public $host = "localhost"; public $user = "user"; public $senha = "password"; public $db = "database"; // arrow the persistence of the connection public $persistent = false; // new PDOConnectionFactory( true ) <--- persistent connection // new PDOConnectionFactory() <--- no persistent connection public function PDOConnectionFactory( $persistent=false ){ // it verifies the persistence of the connection if( $persistent != false){ $this->persistent = true; } } public function getConnection(){ try{ // it carries through the connection $this->con = new PDO($this->dbType.":host=".$this->host.";dbname=".$this->db, $this->user, $this->senha, array( PDO::ATTR_PERSISTENT => $this->persistent ) ); // carried through successfully, it returns connected return $this->con; // in case that an error occurs, it returns the error; }catch ( PDOException $ex ){ echo "We are currently experiencing technical difficulties. We have a bunch of monkies working really hard to fix the problem. Check back soon: ".$ex->getMessage(); } } // close connection public function Close(){ if( $this->con != null ) $this->con = null; } } PAGE USED ON include("includes/connection.php"); $db = new PDOConnectionFactory(); $conn = $db->getConnection(); function test(){ try{ $sql = 'SELECT * FROM topic'; $stmt = $conn->prepare($sql); $result=$stmt->execute(); } catch(PDOException $e){ echo $e->getMessage(); } } test();

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  • HttpURLConnection! Connection.getInputStream is java.io.FileNotFoundException

    - by user3643283
    I created a method "UPLPAD2" to upload file to server. Splitting my file to packets(10MB). It's OK (100%). But when i call getInputStream, i get FileNotFoundException. I think, in loop, i make new HttpURLConnection to set "setRequestProperty". This is a problem. Here's my code: @SuppressLint("NewApi") public int upload2(URL url, String filePath, OnProgressUpdate progressCallBack, AtomicInteger cancelHandle) throws IOException { HttpURLConnection connection = null; InputStream fileStream = null; OutputStream out = null; InputStream in = null; HttpResponse response = new HttpResponse(); Log.e("Upload_Url_Util", url.getFile()); Log.e("Upload_FilePath_Util", filePath); long total = 0; try { // Write the request. // Read from filePath and upload to server (url) byte[] buf = new byte[1024]; fileStream = new FileInputStream(filePath); long lenghtOfFile = (new java.io.File(filePath)).length(); Log.e("LENGHT_Of_File", lenghtOfFile + ""); int totalPacket = 5 * 1024 * 1024; // 10 MB int totalChunk = (int) ((lenghtOfFile + (totalPacket - 1)) / totalPacket); String headerValue = ""; String contentLenght = ""; for (int i = 0; i < totalChunk; i++) { long from = i * totalPacket; long to = 0; if ((from + totalPacket) > lenghtOfFile) { to = lenghtOfFile; } else { to = (totalPacket * (i + 1)); } to = to - 1; headerValue = "bytes " + from + "-" + to + "/" + lenghtOfFile; contentLenght = "Content-Length:" + (to - from + 1); Log.e("Conten_LENGHT", contentLenght); connection = client.open(url); connection.setRequestMethod("POST"); connection.setRequestProperty("Content-Range", headerValue); connection.setRequestProperty("Content-Length", Long.toString(to - from + 1)); out = connection.getOutputStream(); Log.e("Lenght_Of_File", lenghtOfFile + ""); Log.e("Total_Packet", totalPacket + ""); Log.e("Total_Chunk", totalChunk + ""); Log.e("Header_Valure", headerValue); int read = 1; while (read > 0 && cancelHandle.intValue() == 0 && total < totalPacket * (i + 1)) { read = fileStream.read(buf); if (read > 0) { out.write(buf, 0, read); total += read; progressCallBack .onProgressUpdate((int) ((total * 100) / lenghtOfFile)); } } Log.e("TOTAL_", total + "------" + totalPacket * (i + 1)); Log.e("I_", i + ""); Log.e("LENGHT_Of_File", lenghtOfFile + ""); if (i < totalChunk - 1) { connection.disconnect(); } out.close(); } // Read the response. response.setHttpCode(connection.getResponseCode()); in = connection.getInputStream(); // I GET ERROR HERE. if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) { throw new IOException("Unexpected HTTP response: " + connection.getResponseCode() + " " + connection.getResponseMessage()); } byte[] body = readFully(in); response.setBody(body); response.setHeaderFields(connection.getHeaderFields()); if (cancelHandle.intValue() != 0) { return 1; } JSONObject jo = new JSONObject(response.getBodyAsString()); Log.e("Upload_Body_res_", response.getBodyAsString()); if (jo.has("error")) { if (jo.has("code")) { int errCode = jo.getInt("code"); Log.e("Upload_Had_errcode", errCode + ""); return errCode; } else { return 504; } } Log.e("RESPONE_BODY_UPLOAD", response.getBodyAsString() + ""); return 0; } catch (Exception e) { e.printStackTrace(); Log.e("Http_UpLoad_Response_Exception", e.toString()); response.setHttpCode(connection.getResponseCode()); Log.e("ErrorCode_Upload_Util_Return", response.getHttpCode() + ""); if (connection.getResponseCode() == 200) { return 1; } else if (connection.getResponseCode() == 0) { return 1; } else { return response.getHttpCode(); } // Log.e("ErrorCode_Upload_Util_Return", response.getHttpCode()+""); } finally { if (fileStream != null) fileStream.close(); if (out != null) out.close(); if (in != null) in.close(); } } And Logcat 06-12 09:39:29.558: W/System.err(30740): java.io.FileNotFoundException: http://download-f77c.fshare.vn/upload/NRHAwh+bUCxjUtcD4cn9xqkADpdL32AT9pZm7zaboHLwJHLxOPxUX9CQxOeBRgelkjeNM5XcK11M1V-x 06-12 09:39:29.558: W/System.err(30740): at com.squareup.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:187) 06-12 09:39:29.563: W/System.err(30740): at com.fsharemobile.client.HttpUtil.upload2(HttpUtil.java:383) 06-12 09:39:29.563: W/System.err(30740): at com.fsharemobile.fragments.ExplorerFragment$7$1.run(ExplorerFragment.java:992) 06-12 09:39:29.568: W/System.err(30740): at java.lang.Thread.run(Thread.java:856) 06-12 09:39:29.568: E/Http_UpLoad_Response_Exception(30740): java.io.FileNotFoundException: http://download-f77c.fshare.vn/upload/NRHAwh+bUCxjUtcD4cn9xqkADpdL32AT9pZm7zaboHLwJHLxOPxUX9CQxOeBRgelkjeNM5XcK11M1V-x

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  • pdo connection scope

    - by Scarface
    Hey guys I have a connection class I found for pdo. I am calling the connection method on the page that the file is included on. The problem is that within functions the $conn variable is not defined even though I stated the method was public (bare with me I am very new to OOP), and I was wondering if anyone had an elegant solution other then using global in every function. Any suggestions are greatly appreciated. CONNECTION class PDOConnectionFactory{ // receives the connection public $con = null; // swich database? public $dbType = "mysql"; // connection parameters // when it will not be necessary leaves blank only with the double quotations marks "" public $host = "localhost"; public $user = "user"; public $senha = "password"; public $db = "database"; // arrow the persistence of the connection public $persistent = false; // new PDOConnectionFactory( true ) <--- persistent connection // new PDOConnectionFactory() <--- no persistent connection public function PDOConnectionFactory( $persistent=false ){ // it verifies the persistence of the connection if( $persistent != false){ $this->persistent = true; } } public function getConnection(){ try{ // it carries through the connection $this->con = new PDO($this->dbType.":host=".$this->host.";dbname=".$this->db, $this->user, $this->senha, array( PDO::ATTR_PERSISTENT => $this->persistent ) ); // carried through successfully, it returns connected return $this->con; // in case that an error occurs, it returns the error; }catch ( PDOException $ex ){ echo "We are currently experiencing technical difficulties. We have a bunch of monkies working really hard to fix the problem. Check back soon: ".$ex->getMessage(); } } // close connection public function Close(){ if( $this->con != null ) $this->con = null; } } PAGE USED ON include("includes/connection.php"); $db = new PDOConnectionFactory(); $conn = $db->getConnection(); function test(){ try{ $sql = 'SELECT * FROM topic'; $stmt = $conn->prepare($sql); $result=$stmt->execute(); } catch(PDOException $e){ echo $e->getMessage(); } } test();

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  • Internet on Ubuntu 12.04 stopped to work after installing updates from the update manager

    - by roman sukhanov
    I have wireless Internet access and it worked well on Ubuntu 12.04 LTS until today, when I installed updates from the Update Manager. After the reloading of the computer the sign of Internet disappeared and the Internet connection stopped working. I went to the Network section of the System settings and got such a message: The system network services are not compatible with this version. ping 8.8.8.8 gives the result Network is unreachable. What should I do?

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  • Update Manager Not working Fail to Download Repository Information

    - by user51564
    When I try to update, I get this error: Failed to Download your repository information Check your internet connection W:GPG error: http ://ppa.launchpad.net oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 4874D3686E80C6B7, W:Failed to fetch http://ppa.launchpad.net/pmcenery/ppa/ubuntu/dists/oneiric/main/source/Sources 404 Not Found W:Failed to fetch http://ppa.launchpad.net/pmcenery/ppa/ubuntu/dists/oneiric/main/binary-i386/Packages 404 Not Found E:Some index files failed to download. They have been ignored, or old ones used instead.

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  • Track ping, download and upload daily

    - by euDennis
    I'm with some problems with my internet with oscillations in connection, causing some sites to get "Not Found" page sometimes. This isn't all the time, just some random times daily. My question is. There is any tool to monitor these basic information (ping, upload and download) daily to make an report and check the oscillations? Because, if someone from internet provider come at my house, probably it won't see the oscillations. Thanks, bye

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  • Can't connect to windows 7 ad-hoc network

    - by Nikolaj
    Good day! I have installed ubuntu 12.04 on my laptop and I need to have network connection on it. Have a desktop PC, where I've created ad-hoc wi-fi network(Windows 7) and can't connect to it. So, problem: I see my network in the list of networks to connect, but I cant connect to it because it's grey color and not active(can't click on it). Could somebody help me to solve that problem? Thanks in advance!

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  • pppoeconf problem in ubuntu

    - by Vijay Nalawade
    pppoeconf now working in ubuntu 11.04. so i tried using network manager by adding dsl connection.after putting all details user name ,password , service name its working first time, named dslconnection1. but after rebooting i am not able to connect to internet. both ppppoeconf is not working and dslconnection1 option is not visible,also auto etho is not visible. so how to connect to internet in above case

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  • Fan speed monitor Software for Macbook Pro Unibody on Windows

    - by dtmunir
    I've tried multiple temperature monitor and fan speed software on my Macbook Pro Unibody under Windows 7 64-bit RC. None of them can report the fan speed. Currently I'm using SpeedFan which reports the CPU temperature of each of the two cores, but is not able to detect or interface with the Fans. Has anyone had any luck with this?

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  • getting Internet connection sharing working in a slightly more complicated configuration

    - by tirichitirca t
    I have the following configuration: Computer A - Mac OSX 10.8.4, wireless & wired adapters Computer B - Windows 7 (64 bit), wireless & wired adapters, has internet connection via the wired adapter (ethernet) d-link wired/wireless router. Problem to solve: Connect from computer A to the internet through the wired connection of computer B. I tried the following: I set up a local network between A and B using the d-link router. The configuration is this: D-link router - 192.168.0.1 A - wired connection to the d-link router, static 192.168.0.101 (I could have used the wireless but I preferred the wired connection) B - wireless connection to the d-link router DHCP 192.168.0.102 (but I made sure it always gets the same address) B - wired connection to the internet using some address that begins with 10.x.y.z. In this configuration A can see B. I enabled ICS on the wired adapter of B. I set up the Gateway of A to point to B and DNS servers to point to the DNS servers specified for the 10.x.y.z address. It doesn't work, A goes only as far as B. It can ping the 10.x.y.z address of B though. I then found this article: http://terrybritton.com/windows-internet-connection-sharing-ics-not-working-with-linux-bridging-is-the-solution-916/. Terry is suggesting that a bridge should be defined on B between the two connections. I tried that but basically computer B is screwed as soon as I create the bridge. It can't connect to the internet anymore. It is as if the network bridge seems to think the traffic to the internet should go from the wired connection to the wireless and not the other way around. The other thing that puzzles me is the router itself. In general the router needs an internet address. In a normal configuration it is the router that gets the ip address and the internet traffic goes through the router. In my case I am not interested in that. So, any suggestions to get this working? I wouldn't shy away from using a commercial software but I would think windows 7 should allow me to do it. Thanks

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  • Maximum speed of data transmission

    - by JavaRocky
    All major data carriers these days use fiber optic links these days. And data transmission occurs at the speed of light, is that correct? If data transmission does indeed occur at the speed of light, is it also correct to assume that data transmission will never ever be faster?

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  • How to connect a Bluetooth network connection using the command line

    - by Ed Guiness
    I can enable a Local Area Network interface for my machine with the command netsh interface set interface "Local Area Connection" ENABLED Is there an equivalent command to connect a bluetooth network connection? I've tried netsh interface set interface "Bluetooth" ENABLED but it seems to have no effect, the connection remains disconnected. I also tried netsh interface set interface "Bluetooth" connect=CONNECTED but this returns One or more essential parameters not specified I know this Bluetooth connection is otherwise ok since I am able to connect using Control Panel Network Connections, right-clicking on Bluetooth Connect.

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  • Mac limit update download speed

    - by ILMV
    I have a Macbook with Snow Leopard that I need to update, but I want to limit the speed so it doesn't wipe out my entire bandwidth. Is there an application or setting change I can use to limit the speed to 20KBps? I've already tried ipfw through the terminal with little success. Thanks :-)

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  • question about a sata read/write speed

    - by Joe
    I'm contemplating biting the bullet for an ssd drive in a server, obviously I know it will be MUCH faster than a regular 7200rpm sata2 3gbps drive. The nice thing about ssd's is often they post the read/write speed but that info isn't available for sata's so I'm just curious to know what a typical read/write speed would be for a seagate 120gb 7200rpm drive. I know it fluctuates from manufacturer and model series but I'm just looking for a guestimate.

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