Edit Distance Java - Similar String

The edit distance of two strings commonly refers to the Levenshtein Distance of two strings- the amount of work it takes to transform one string to the other by either inserting, deleting, or changing one character at a time.

For example, changing sitting -> kitten takes 3
moves: sitting -> kitting, kitting -> kittin, and finally kittin -> kitten.

The algorithm to solve this in reasonable time takes dynamic programming, and has many applications such as word checking, and typing speed tests. Algorithm below:

public static int editDistance(String s, String t){
    int m=s.length();
    int n=t.length();
    int[][]d=new int[m+1][n+1];
    for(int i=0;i<=m;i++){
      d[i][0]=i;
    }
    for(int j=0;j<=n;j++){
      d[0][j]=j;
    }
    for(int j=1;j<=n;j++){
      for(int i=1;i<=m;i++){
        if(s.charAt(i-1)==t.charAt(j-1)){
          d[i][j]=d[i-1][j-1];
        }
        else{
          d[i][j]=min((d[i-1][j]+1),(d[i][j-1]+1),(d[i-1][j-1]+1));
        }
      }
    }
    return(d[m][n]);
  }
  public static int min(int a,int b,int c){
    return(Math.min(Math.min(a,b),c));
  }

It is important to note that there are only three possibilities one string can get to another: either deleting, inserting, or changing.

Thus, if we let L(i,j) indicate the cost it takes from changing i to j, if s and t are the original strings, the cost is:

Math.min(1+L(i-1,j-1),1+L(i,j-1),1+L(i-1,j)) unless the last characters of the strings are the same, then the minimum is L(i-1,j-1). This solves the problem, but note that it is very slow because of all the recursive calls, which repeat many similiar problems.

Thus, we use dynamic programming: Construct a matrix d[m][n] with sizes s.length() and t.length(). instead of recursive calls, we will use a matrix lookup which will store the smallest current cost to change a smaller i into j.

Thus, with he java algorithm code for edit distance above, the speed is O(mn) where m and n are the sizes of the strings.

www.arteverdehabitat.it a modern successful website: Designs gardens and parks in Padua

Arteverde www.arteverdehabitat.it is the last website that I posted. Arteverde designs and builds gardens and parks in Padua, Vicenza and throughout the Veneto. I built thiswebsite using prestashop.

Has been studied usability and strategies to increase the ranking. in a few days he wasvisited by thousands of visitors.

What do you think?

www.arteverdehabitat.it Progettazione giardini padova

Free Old Sticky Tape Textures + PS Brushes

Now here’s something very useful – high resolution sticky tape textures and Photoshop brushes. The images are scans of a few old clear tapes that I have peeled off some book jacket covers. Well, they’re not so clear anymore as time has turned them brown yellow, but now they make cool adhesive tape textures :). As mentioned before the images are hi-res – tape strip width is around 610px.
I have also put together 17 unique high resolution Photoshop brushes (around 2500px). I really like the way these brushes came out as you can quickly plaster a piece of scotch tape across a picture and get a realistic result. Here’s an image sample of how that looks:
 

QUICK TIP: Just as with these sticky tape brushes, not all of them have the desired orientation by default. There are two ways of rotating them. The best method depends on the particular brush and how you intent to use it; in the image above I used each brush on a separate layer on top of the picture and rotated them individually with the Free Transform Tool. The other way to do it is to select your brush and then in the Brushes window (Window>Brushes or F5) select Brush Tip Shape and rotate the circle as shown in the image below.
This second method would be very useful if you needed to use the same brush at a certain angle multiple times.
Check out the sticky tape textures and brushes screenshot below and the downloads are right after. Share the post or leave me a comment if you like them. Thanks!

 

Download Hi-Res Old Sticky Tape Textures (zip file 7.5mb)
Download Hi-Res Old Sticky Tape PS Brushes (abr) (zip file 16.5mb)

0digg

BALLETTI & SHOW CHALLENGE IN VILLAGANZERLA, my new web site

This is my last web site http://www.ballettieshow.it

I build it for a ballet challenge: classic, modern dance, hip hop

What do you think about this site. I used prestashop framework

Install GUI in Ubuntu Server

We have already discussed how to install ubuntu 9.04 LAMP server .If you are a new user and not familiar with command prompt you can install GUI for your ubuntu LAMP server using the 2 options


1) Install desktop Environment
2) Install Webmin

1) Install desktop Environment
First you nee to make sure you have enabled Universe and multiverse repositories in /etc/apt/sources.list file once you have enable you need to use the following command to install GUI

sudo apt-get update

sudo apt-get install ubuntu-desktop

The above command will install GNOME desktop
If you wan to install a graphical desktop manager without some of the desktop addons like Evolution and OpenOffice, but continue to use the server flavor kernel use the following command

sudo aptitude install --without-recommends ubuntu-desktop

If you want to install light weight desktop install xfce using the following command

sudo apt-get install xubuntu-desktop

If you want to install KDE desktop use the following command

sudo apt-get install kubuntu-desktop

2) Install Webmin in Ubuntu
Webmin is a web-based interface for system administration for Unix. Using any modern web browser, you can setup user accounts, Apache, DNS, file sharing and much more. Webmin removes the need to manually edit Unix configuration files like /etc/passwd, and lets you manage a system from the console or remotely.Currently There is no Webmin package in the Ubuntu repositories.This tutorial will explain how to Install Webmin in Ubuntu Jaunty
You can install webmin for your server web interface to configure apache2,mysql,FTp servers and many more.Now we will see how to install webmin in Ubuntu 9.04

Preparing your system
First you need to install the following packages

sudo aptitude install perl libnet-ssleay-perl openssl libauthen-pam-perl libpam-runtime libio-pty-perl libmd5-perl

Now download the latest webmin using the following command or from here

wget http://prdownloads.sourceforge.net/webadmin/webmin_1.470_all.deb

Now we have webmin_1.470_all.deb package install this package using the following command

sudo dpkg -i webmin_1.470_all.deb

This will complete the installation.

Using the Webmin APT repository
If you like to install and update Webmin via APT, edit the /etc/apt/sources.list file on your system

sudo vi /etc/apt/sources.list

add the line

deb http://download.webmin.com/download/repository sarge contrib

Save and exit the file
You should also fetch and install my GPG key with which the repository is signed, with the commands : cd /root

wget http://www.webmin.com/jcameron-key.asc

sudo apt-key add jcameron-key.asc

You will now be able to install with the commands

sudo apt-get update

sudo apt-get install webmin

All dependencies should be resolved automatically.
Ubuntu in particular don’t allow logins by the root user by default. However, the user created at system installation time can use sudo to switch to root. Webmin will allow any user who has this sudo capability to login with full root privileges.

Now you need to open your web browser and enter the following

https://your-server-ip:10000/

Now you should see similar to the following Screen





After login if you want to configure Apache,Mysql server you need to click on Servers on your lefthand side you should many servers are ready to configure
This is very Easy to configure most of the servers and Enjoy your new Ubuntu Jaunty LAMP Server.

Bandwidth Monitoring Tools For Linux

Bandwidth in computer networking refers to the data rate supported by a network connection or interface. One most commonly expresses bandwidth in terms of bits per second (bps). The term comes from the field of electrical engineering, where bandwidth represents the total distance or range between the highest and lowest signals on the communication channel (band).

Bandwidth represents the capacity of the connection. The greater the capacity, the more likely that greater performance will follow, though overall performance also depends on other factors, such as latency.

Bandwidthd
BandwidthD tracks usage of TCP/IP network subnets and builds html files with graphs to display utilization. Charts are built by individual IPs, and by default display utilization over 2 day, 8 day, 40 day, and 400 day periods. Furthermore, each ip address’s utilization can be logged out at intervals of 3.3 minutes, 10 minutes, 1 hour or 12 hours in cdf format, or to a backend database server. HTTP, TCP, UDP, ICMP, VPN, and P2P traffic are color coded.
Current Stable Version :- 2.0.1
Project Home Page :- http://bandwidthd.sourceforge.net/

Bmon
bmon is a portable bandwidth monitor and rate estimator running on various operating systems. It supports various input methods for different architectures. Various output modes exist including an interactive curses interface,lightweight HTML output but also formatable ASCII output.

Bwbar
bwbar is a small C-based program for Linux-based machines which produces bandwidth usage statistics for a network interface. It was originally written by H. Peter Anvin, and I (Brian Towne) modified it somewhat to better suit my needs. The original program was released under the GPL. A number of people have asked for the modified program and its source, so I have created this page.
Current Stable Version :- 1.2.3

bwm
This is a very tiny bandwidth monitor (not X11). Can monitor up to 16 interfaces in the in the same time, and shows totals too.
Current Stable Version :- 1.1.0

bwm-ng
small and simple console-based bandwidth monitor.Bandwidth Monitor NG is a small and simple console-based live bandwidth monitor.
Current Stable Version :- 0.6
Project Home Page :- http://www.gropp.org/?id=projects&sub=bwm-ng

Cacti
Cacti is a complete network graphing solution designed to harness the power of RRDTool’s data storage and graphing functionality. Cacti provides a fast poller, advanced graph templating, multiple data acquisition methods, and user management features out of the box. All of this is wrapped in an intuitive, easy to use interface that makes sense for LAN-sized installations up to complex networks with hundreds of devices.
Current Stable Version :- 0.8.7e
Project Home Page :- http://cacti.net/

cbm
cbm — the color bandwidth meter — is a small program to display the traffic currently flowing through your network devices.
Current Stable Version :- 0.1

dstat
Dstat is a versatile replacement for vmstat, iostat, netstat, nfsstat and ifstat. Dstat overcomes some of their limitations and adds some extra features, more counters and flexibility. Dstat is handy for monitoring systems during performance tuning tests, benchmarks or troubleshooting.
Current Stable Version :- 0.7.1
Project Home Page :- http://dag.wieers.com/home-made/dstat/

EtherApe
EtherApe is a graphical network monitor for Unix modeled after etherman. Featuring link layer, ip and TCP modes, it displays network activity graphically. Hosts and links change in size with traffic. Color coded protocols display.
Current Stable Version :- 0.9.9
Project Home Page :- http://etherape.sourceforge.net/

gdesklets
gDesklets is a system for bringing mini programs (desklets), such as weather forecasts, news tickers, system information displays, or music player controls, onto your desktop, where they are sitting there in a symbiotic relationship of eye candy and usefulness. The possibilities are really endless and they are always there to serve you whenever you need them, just one key-press away. The system is not restricted to one desktop environment, but currently works on most of the modern Unix desktops (including GNOME, KDE, Xfce).
Current Stable Version :- 0.36.1
Project Home Page :- http://www.gdesklets.de/

GKrellM
GKrellM is a single process stack of system monitors which supports applying themes to match its appearance to your window manager, Gtk, or any other theme.
Current Stable Version :- 2.3.4
Project Home Page :- http://members.dslextreme.com/users/billw/gkrellm/gkrellm.html

ipband
ipband is a pcap based IP traffic monitor. It tallies per-subnet traffic and bandwidth usage and starts detailed logging if specified threshold for the specific subnet is exceeded. If traffic has been high for a certain period of time, the report for that subnet is generated which can be appended to a file or e-mailed. When bandwidth usage drops below the threshold, detailed logging for the subnet is stopped and memory is freed.
Current Stable Version :- 0.8.1
Project Home Page :- http://ipband.sourceforge.net/

iftop
iftop does for network usage what top does for CPU usage. It listens to network traffic on a named interface and displays a table of current bandwidth usage by pairs of hosts. Handy for answering the question “why is our ADSL link so slow”.
Current Stable Version :- 0.17
Project Home Page :- http://www.ex-parrot.com/pdw/iftop/

iperf
Iperf is a tool to measure maximum TCP bandwidth, allowing the tuning of various parameters and UDP characteristics. Iperf reports bandwidth, delay jitter, datagram loss.

ipfm
IP Flow Meter (IPFM) is a bandwidth analysis tool, that measures how much bandwidth specified hosts use on their Internet link.
Current Stable Version :- 0.11.5
Project Home Page :- http://robert.cheramy.net/ipfm/

ifstat
ifstat is a tool to report network interfaces bandwith just like vmstat/iostat do for other system counters.
Current Stable Version :- 1.1
Project Home Page :- http://gael.roualland.free.fr/ifstat/

ibmonitor
ibmonitor is an interactive linux console application which shows bandwidth consumed and total data transferred on all
interfaces.
Current Stable Version :- 1.4
Project Home Page :- http://ibmonitor.sourceforge.net/

ipaudit
IPAudit monitors network activity on a network by host, protocol and port.IPAudit listens to a network device in promiscuous mode, and records every connection between two ip addresses. A unique connection is determined by the ip
addresses of the two machines, the protocol used between them, and the port numbers (if they are communicating via udp or tcp).
Current Stable Version :- 0.95

Project Home Page :- http://ipaudit.sourceforge.net/

IPTraf
IPTraf is a console-based network statistics utility for Linux. It gathers a variety of figures such as TCP connection packet and byte counts, interface statistics and activity indicators, TCP/UDP traffic breakdowns, and LAN station packet and byte counts.
Current Stable Version :- 3.0.0

Project Home Page :- http://iptraf.seul.org/

IFStatus
IFStatus was developed for Linux users that are usually in console mode. It is a simple, easy to use program for displaying commonly needed / wanted statistics in real time about ingoing and outgoing traffic of multiple network interfaces that is usually hard to find, with a simple and effecient view. It is the substitute for PPPStatus and EthStatus projects.
Current Stable Version :- 1.1.0

jnettop
Jnettop is a traffic visualiser, which captures traffic going through the host it is running from and displays streams sorted by bandwidth they use.
Current Stable Version :- 0.13.0
Project Home Page :- http://jnettop.kubs.info/wiki/

MRTG
The Multi Router Traffic Grapher (MRTG) is a tool to monitor the traffic load on network links. MRTG generates HTML pages containing PNG images which provide a LIVE visual representation of this traffic.
Current Stable Version :- 2.16.3
Project Home Page :- http://oss.oetiker.ch/mrtg/

moodss
moodss is a graphical monitoring application. It is modular so that the code accessing the monitored objects is completely separate from the application core. The core takes care of managing modules (loading and unloading),displaying modules data through sortable tables and diverse graphical viewers, handling user set threshold conditions with email alerts, recording and browsing data history from a database.moodss can even predict the future, using sophisticated statistical methods and artificial neural networks, and therefore be used for capacity planning.
Current Stable Version :- 21.5
Project Home Page :- http://moodss.sourceforge.net/

monitord
A lightweight (distributed?) network security monitor for TCP/IP+Ethernet LANs. It will capture certain network events and record them in a relational database. The recorded data will be available for analysis through a CGI based interface.
Current Stable Version :- 4.0
Project Home Page :- http://sourceforge.net/projects/monitord/

Netmrg
NetMRG is a tool for network monitoring, reporting, and graphing. Based on RRDTOOL, the best of open source graphing
systems, NetMRG is capable of creating graphs of any parameter of your network.
Current Stable Version :- 0.20
Project Home Page :- http://www.netmrg.net

nload
nload is a console application which monitors network traffic and bandwidth usage in real time. It visualizes the in-and outgoing traffic using two graphs and provides additional info like total amount of transfered data and min/max network usage.
Current Stable Version :- 0.7.2
Project Home Page :- http://www.roland-riegel.de/nload/index.html

ntop
ntop shows the current network usage. It displays a list of hosts that are currently using the network and reports information concerning the IP (Internet Protocol) and Fibre Channel (FC) traffic generated by each host. The traffic is sorted according to host and protocol. Default protocol list (this is user configurable).
Current Stable Version :- 3.3.10
Project Home Page :- http://www.ntop.org

netspeed
Netspeed is just a little GNOME-applet that shows how much traffic occurs on a specified network device (for example eth0). You get the best impression of it, if you look at the screenshots below.
Current Stable Version :- 0.14
Netwatch
Netwatch is a Linux program created to aid in monitoring Network Connections. It is based on a program called “statnet” but has been substantially modified for its Ethernet emphasis. It is a dynamic program which displays the Ethernet status based each the connection’s activity. It has the capability of monitoring hundreds of site statistics simultaneously. The connection’s port number (Well Known Service) and destination address are available as well. There are options which allow router statistics to be measured on simple networks (with one router). External network communication is counted and transfer rates are displayed.
Current Stable Version :- 1.3.0-1
Project Home Page :- http://www.slctech.org/~mackay/netwatch.html

NOCOL
NOCOL is a popular system and network monitoring (network management) software that runs on Unix systems and can
monitor network and system devices. It uses a very simple architecture and is very flexible for adding new network management modules
Current Stable Version :- 4.3.1
Project Home Page :- http://www.netplex-tech.com/nocol/

NeTraMet
NeTraMet is an open-source (GPL) implementation of the RTFM architecture for Network Traffic Flow Measurement,
developed and supported by Nevil Brownlee at the University of Auckland. Nevil also developed a version of NeTraMet
which uses the CoralReef library to read packet headers. This ‘CoralReef NeTraMet meter’ can work with any CoralReef
data source; it has been tested on both CAIDA and NLANR trace files, and on DAG and Apptel ATM interface cards.
Current Stable Version :- 43
Project Home Page :- http://freshmeat.net/projects/netramet/

NetPIPE
NetPIPE is a protocol independent performance tool that visually represents the network performance under a variety of
conditions. It performs simple ping-pong tests, bouncing messages of increasing size between two processes, whether
across a network or within an SMP system. Message sizes are chosen at regular intervals, and with slight perturbations, to provide a complete test of the communication system. Each data point involves many ping-pong tests to provide an accurate timing. Latencies are calculated by dividing the round trip time in half for small messages ( <64 Bytes ).
Current Stable Version :- 3.7.1
Project Home Page :- http://www.scl.ameslab.gov/netpipe/

netperf
Netperf is a benchmark that can be use to measure various aspect of networking performance. The primary foci are bulk
(aka unidirectional) data transfer and request/response performance using either TCP or UDP and the Berkeley Sockets interface. As of this writing, the tests available either unconditionally or conditionally
Current Stable Version :- 2.4.5
Project Home Page :- http://www.netperf.org/netperf/

potion
This is a console utility which will listen on an interface using libpcap, aggregate the traffic into flows and display the top (as many as can fit on your screen) flows with their average throughput. A flow is identified ip protocol, source ip, source port, destination ip, destination port, and type of service flag.
Current Stable Version :- 0.0.4

pktstat
Display a real-time list of active connections seen on a network interface, and how much bandwidth is being used by what. Partially decodes HTTP and FTP protocols to show what filename is being transferred. X11 application names are also shown. Entries hang around on the screen for a few seconds so you can see what just happened. Also accepts filter expressions á la tcpdump.
Current Stable Version :- 1.8.4
Project Home Page :- http://www.adaptive-enterprises.com.au/~d/software/pktstat/

RTG
RTG is a flexible, scalable, high-performance SNMP statistics monitoring system. It is designed for enterprises and service providers who need to collect time-series SNMP data from a large number of targets quickly. All collected data is inserted into a relational database that provides a common interface for applications to generate complex queries and reports. RTG includes utilities that generate configuration and target files, traffic reports, 95th percentile reports and graphical data plots. These utilities may be used to produce a web-based interface to the data.
Current Stable Version :- 0.7.4
Project Home Page :- http://rtg.sourceforge.net/

speedometer
Monitor network traffic or speed/progress of a file transfer. The program can be used for cases like: how long it will take for my 38MB transfer to finish, how quickly is another transfer going, How fast is the upstream on this ADSL line and how fast can I write data to my filesystem.
Current Stable Version :- 2.6
Project Home Page :- http://excess.org/speedometer/

Spong
Spong is a simple system-monitoring package written in Perl. It features client based monitoring, monitoring of network services, results displayed via the Web or console, history of problems, and flexible messaging when problems occur.
Current Stable Version :- 2.7.6
Project Home Page :- http://spong.sourceforge.net/

slurm
slurm started as a pppstatus port to FreeBSD. As I ripped off several functions
Current Stable Version :- 0.3.3

SNIPS
SNIPS (System & Network Integrated Polling Software) is a system and network monitoring software that runs on Unix systems and can monitor network and system devices. It is capable of monitoring DNS, NTP, TCP or web ports, host performance, syslogs, radius servers, BGP peers, etc. New monitors can be added easily (via a C or Perl API).
Current Stable Version :- 1.1
Project Home Page :- http://www.navya.com/software/snips/

tcpflow
tcpflow is a program that captures data transmitted as part of TCP connections (flows), and stores the data in a way
that is convenient for protocol analysis or debugging. A program like tcpdump shows a summary of packets seen on the
wire, but usually doesn’t store the data that’s actually being transmitted. In contrast, tcpflow reconstructs the actual data streams and stores each flow in a separate file for later analysis. tcpflow understands TCP sequence numbers and will correctly reconstruct data streams regardless of retransmissions or out-of-order delivery.
Current Stable Version :- 0.21
Project Home Page :- http://www.circlemud.org/~jelson/software/tcpflow/

vnstat
vnStat is a network traffic monitor for Linux that keeps a log of daily network traffic for the selected interface(s).vnStat isn’t a packet sniffer. The traffic information is analyzed from the /proc -filesystem, so vnStat can be used without root permissions. However at least a 2.2.x kernel is required.
Current Stable Version :- 1.10
Project Home Page :- http://humdi.net/vnstat/

WMND
Shows a graph of incoming/outgoing traffic, activity indicators for rx/tx and current/maximum rate for rx/tx in bytes or packets.Tailored for use with WindowMaker, it will as well work with any other window manager though.
Current Stable Version :- 0.4.13
Project Home Page :- http://dockapps.org/file.php/id/178

Speed Up Firefox web browser

Mozilla Firefox is a graphical web browser developed by the Mozilla Corporation. Started as a fork of the browser component (Navigator) of the Mozilla Application Suite, Firefox has replaced the Mozilla Suite as the flagship product of the Mozilla project, stewarded by the Mozilla Foundation and a large community of external contributors.

Mozilla Firefox is a cross-platform browser, providing support for various versions of Microsoft Windows, Mac OS X, and Linux. Although not officially released for certain operating systems, the freely available source code works for many other operating systems, including FreeBSD,OS/2, Solaris, SkyOS, BeOS and more recently, Windows XP Professional x64 Edition.

I am providing some Very Useful Tips to speedup your Firefox.

In your location bar, type about:config

Once it Opens You should see similar to the following screen



Tip1
In the filter bar type network.http.pipelining

You should see the following screen



Normally it says ” false ” under value field , Double click it so it becomes ” true “.
Once you finished this you should see the following screen.



Tip2
In the filter bar again and type network.http.pipelining.maxrequests
Once it Opens You should see the following screen



Default it says 4 under value field and you need to change it to 8
Once you finished this you should see the following screen.



Tip3
Go to the filter bar again and type network.http.proxy.pipelining
Once it Opens You should see similar to the following screen



Normally it says ” false ” under value field , Double click it so it becomes ” true “.
Once you finished this you should see the following screen.



Tip4
Go to the filter bar again and type network.dns.disableIPv6
Once it Opens You should see the following screen



Normally it says ” false ” under value field , Double click it so it becomes ” true “.
Once you finished this you should see the following screen.



Tip5
Go to the filter bar again and type plugin.expose_full_path
Once it Opens You should see the following screen



Normally it says ” false ” under value field , Double click it so it becomes ” true “.
Once you finished this you should see the following screen.



Tip6
Now you need to Create new Preference name with interger value for this got to Right click -> New -> Integer



Once it opens you should see the following screen



Here you need to type nglayout.initialpaint.delay and click ok



Now you need to enter 0 in value filed and click ok



Once you finished this you should see the following screen.



Tip7
Now you need to Create one more Preference name with interger value for this got to Right click -> New -> Integer



Once it opens you should see the following screen



Here you need to type content.notify.backoffcount and click ok



Now you need to enter 5 in value filed and click ok



Once you finished this you should see the following screen.



Tip8
Now you need to Create one more Preference name with interger value for this got to Right click -> New -> Integer


 
Once it opens you should see the following screen



Here you need to type ui.submenuDelay and click ok



Now you need to enter 0 in value filed and click ok



Once you finished this you should see the following screen.



Some more Tweaks
Enable the spellchecker for inputfields and textareas (default is textareas only)
layout.spellcheckDefault=2
Open lastfm://-links directly in amarok
network.protocol-handler.app.lastfm=amarok
network.protocol-handler.external.lastfm=true

Firefox Memory Leak Fix
Open a new tab. Type “about:config” without quotes into the address bar and hit enter/click Go.

Right-click anywhere, select New, then Integer. In the dialog prompt that appears, type:
browser.cache.memory.capacity
Click OK. Another dialog prompt will appear. This is where you decide how much memory to allocate to Firefox. This depends on how much RAM your computer has, but generally you don’t want to allocate too little (under 8MB), but if you allocate too much, you might as well not do this. A good recommended setting is 16MB. If you want 16MB, enter this value into the dialog prompt:

16384
(Why 16384 instead of 16000? Because computers use base-12 counting. Thus 16 megabytes = 16384 bytes. Likewise, if you want to double that and allocate 32MB, you’d enter 32768.)
Click OK to close the dialog box, then close all instances of Firefox and restart. If your Firefox still uses the same amount of memory, give it a few minutes and it should slowly clear up. If that fails, try a system reboot.

Now your Firefox will now be 3 - 30 times faster in loading pages.