In order for a site to load up quickly, it must not have to much content taking up the bandwidth. The higher the file size of content the slower the bandwidth meaning it will take ages to fully load up your website. I took an image and opened it into photoshop, i then went to file > save for web and devices. a window opens allowing you to view the original image in four different image panes. You can then change the image formats on each image pane and compare them whilst you alter the colours and quality of the image. i was trying to get the best possible quality match but with the lowest file size. As i mentioned earlier, images with high files sizes take longer to load because of there quality. In this editing window you can also adjust the resolution of the image, by changing the height and width pixel sizes. This also affected the file size, not only does it show the file size, but it also shows the time taken to open in a browser. The image below is of an 'save for web and devices' editing window:
Bandwidth
In
computer networking and
computer science, the words bandwidth,
[1] network bandwidth,
[2] data bandwidth,
[3] or digital bandwidth
[4][5] are colloquial and metaphoric terms widely used in textbooks
[6] as well as scientific papers, patents and standards
[7] to refer to various
bit-rate measures, representing the available or consumed data communication resources expressed in bits/second or multiples of it (kilobits/s, megabits/s etc.).
Note that in textbooks on
signal processing,
wireless communications,
modem data transmission,
digital communications,
electronics, etc., the word 'bandwidth' is used to refer to analog
signal bandwidth measured in
hertz — the original meaning of the term.[
citation needed] Some computer networking authors[
who?] prefer less ambiguous terms such as
bit rate,
channel capacity and
throughput rather than the colloquial use of the word 'bandwidth' for bit/s, to avoid this confusion.
http://en.wikipedia.org/wiki/Bandwidth_(computing)
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