Fireworks vs Photoshop Compression Fireworks 与photoshop的图片优化能力比较
Surprisingly enough, based on the findings from my recent survey there are quite a bit of Fireworks users. Personally, I never used Fireworks. Photoshop is alway my first choice for designing—from image editing to designing mock-ups. But, did you know that Fireworks is way better than Photoshop in term of image compression? I’m not a software engineer, I can’t explain why Fireworks can compress better. But I can prove it to you by showing a series of experiments I did. 简单说作者是一直坚持用photoshop的，无论做网页设计还是图片优化都是如此，但作者经实验实际发现fireworks在图片优化上有很好的性能
PNG Compression 以PNG格式优化输出的比较 For testing purpose, I used an un-compressed image with transparency. I used Photoshop to export the image to PNG-24 with transparency and the resulting file size is about 352 kb. Then I used the same image and exported it to PNG-32 with Fireworks. The file size is about 332 kb. Visually, they both look the same (at least to me). In term of file size, the image exported with Fireworks is about 20 kb less.
GIF Compression 以GIF格式优化输出的比较 Next I exported the image to GIF 256 colors, adaptive, with no dither. The results are: Fireworks = 88kb, Photoshop = 92kb. That is 4 kb less. Also, they don’t look the same. I prefer the image exported with Fireworks because it has more image details. 如下面图所示，这次以gif256色导出图片，结果fireworks88kb，photoshop92kb，从尺寸上来看只相差4k而已，但是从导出的图片细节来看，fireworks导出的图片细节更多，看上去效果更好
JPG Compression 以JPG 格式优化输出的比较 Now, I’m going to try the JPG compression with a different image. I exported the image with Photoshop to 60% quality JPG and the file size is 80 kb. Then I exported the same image with Fireworks to 80% quality JPG and the result is 72 kb. Both exported images look pretty much the same, but Fireworks beats Photoshop by 8 kb in this case. 如下图：最后是以jpg格式输出的比较，在photoshop以品质60%导出，fireworks下以品质80%导出，（不羁虫：作者的体会和我一样，这2个软件导出品质不同，ps里的60%效果相当于fs里的80%），图片看上去效果差不多，不过尺寸上还是fireworks胜出，fs72kb,ps80kb。
Please note: Fireworks and Photoshop have different compression technology. 80% compression rate in Fireworks is relevant to Photoshop 60% compression rate.
What Is The Big Deal? 有什么大问题？ You’re probably thinking: what is the big deal? It is only a few kilobytes… Well, don’t under estimate the little difference in kilobytes, it can make a big difference on your bandwidth and load time. Lets use the background image on WebDesignerWall as an example. If I export the background with Fireworks, I can reduce its file size by 20 kb. I get about 16,000 visits per day on average. 20 kb x 16, 000 = 320, 000 kb. Yes, that is 320 megabytes per day! I’m only talking about the background image here. Could you imagine how much bandwidth I can save if I compress all the graphics on the site with Fireworks? Most importantly, I can make my site load faster and that is a big deal! 这段想法是比较深远滴，我就半参着自己的想法讲了：可能从优化上来讲，从上面的实验我们可以看到，一个图片优化下来想得到同样效果的图片，ps和fs虽然只差3，5k（视图片尺寸和格式，尺寸越大的图片，这个差距应该是越大），但如果整站下来，你会发现，fs优化后得出的图片尺寸整体要比ps要小很多，而从单个图片来看，如果一个图片能小20kb，而你的网站每天的访问量如果是1万6，那网站所要承担的流量差距是：20k*16000=320m，而从用户体验上来讲，更快的下载将给浏览者带来更好更快的加载效果，更好的用户体验，这是个很大的问题！
Conclusion 结论： If you have Photoshop and Fireworks installed on your computer, try it yourself. You will be surpised with the results. From now on, I’m going to use Fireworks to export my web graphics, particularly the template graphics. 不用说了，如果你还在使用ps优化网页图片的话，赶紧换用fireworks吧，ps不是万能的，用fs优化图片的、将得到更好的效果，而且优化图片的方式你会发现ps的切片将会让你的优化操作更快更准确
歌词： • I was found on the ground by the fountain at valder fields 我被发现时，正偷偷地躺在valder fields的泉水旁 • and was almost dry 但太阳晒得我身上几乎是干的 • lying in the sun after I had tried 工作劳累之后，我躺在阳光下偷懒 • lying in the sun by the side 躺在远离尘世的阳光下 • We had agreed that the council would end at three hours over time 我们都认为议会会超过三个小时 • shoelaces were tied at the traffic lights 在路上遇到交通堵塞了 • I was running late I could apply for another one I guessed 我想我快迟到了，但可以准备寻找另外一份工作 • If department stores are best 如果百货公司这份工作是最好的 • They said there would be delays 同事们说会议要延迟了 • and only temporary pay 却只能拿到临时薪水 music …… • For another one I guess 也许换一个工作也不错吧 • If department stores are best 如果百货公司这份工作是最好的 • They said there would be delays 同事们说会议要延迟了 • and only temporary pay 却只能拿到临时薪水 • She was found on the ground in a gown made at valder fields 她被发现在一片田野里，穿着valder fields当地的长袍 • and was sound asleep on the stairs outside the door to the man who cried 她在静静地听著那个坐在门外台阶的男人在大声地说 • when he said that he loved his life 他很热爱他的生活 • We had agreed that the council 我们都觉得那会议组会 • should take his keys to the bedroom door 应该把他带到卧室去 • incase she stepped outside 以防她又在外面游荡 • and was found in two days 两天后又发现 • in valder fields with a mountain view 她正陶醉在valder fields的山色美景中
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