Showing posts from December 27, 2009

disk defragmentation

2009-12-30 Windows has a disk defrag tool build in. Just click on the disk and get properties, then under Tools tab. I am a efficiency nerd, but don't really trust defrag tools as it can corrupt your files. (sure i have backup, but to invoke it is a pain) Since Microsoft bundles it with Windows and this is 2009 not 1990s, i suppose it is safe, but still. Also, i always do partition my drives, but on this machine it's just one volumn of 685 GB. Usually partitioning is best done when you just bought the machine. But with PC today, it doesn't comes with a Windows installation disk anymore, so it's more difficult and i haven't partitioned my drives. Anyhow, on the Mac, the system does not bundle a defrag tool, and i always wondered why not.Wikipedia Defrag has some thing to say about this:HFS Plus (Mac OS X) In 1998 it introduced a number of optimizations to the allocation algorithms in an attempt to defragment files while they are being accessed without a separate defr…

google on web master things

2009-12-26 Google did a experiment on how speed effect users. Interesting reading. Speed Matters (2009-06-23) by Jake Brutlag. SourceA more informative article with clear summary is here: Bing and Google Agree: Slow Pages Lose Users (2009-06-23) by Brady Forrest. SourceOf course we all know that we don't like slow pages, but the interesting thing is that even a 0.4 sec delay has measurable impact. Another, about minor and major experiments google is doing: Search experiments, large and small (2008-08-26) by Ben Gomes. SourceMore readings: A interesting thing on the site is this link:, showing the few hundred variation of spellings people used to search Britney Spears. From this, we can infer how much trouble they take just for the spell correction feature, and further, how extremely complex the search technology actually is, beneath the extremely simple interface.