瀏覽器大戰,走的方向都是以運行 Web Application 為主,所以大力加重 Javascript 的效能改進,得益的自然是一般用戶。可是,我想即使是現在,仍然有很多開發工作要以 IE6 為對象。IE6 除了超多 CSS 臭蟲 外,Javascript Engine 的漏水 (記憶) 情況也是很嚴重。
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Why negative DNS caching is necessary
DNS software in general has two forms of caching, which I've seen called'positive' and 'negative'. Positive entries hold actual answers obtainedfrom authoritative servers (theoretically, see Dan Kaminsky's DNSattack), while negative entries mark entries that (theoretically) don'texist. Positive entries are cached for their TTL value; negative entries don't have a TTL themselves, but more or lessinherit a TTL from the zone's SOA record.
(The details are complicated .)
澳洲幫坐冷板櫈

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Something to remember when using DTrace on userland programs
As mentioned before , Solaris's DTraceis fundamentally a kernel debugger; in order to extract informationfrom userland programs, you need to copy it to kernel space (generallyusing DTrace's copyin() function) before you can start printing it orotherwise use it.The most important thing to remember about this is that you wind updealing with two sorts of pointers: userland pointers, which is whatare in all of those data structures you copy in from your program, andkernel pointers, which is what
不稱之哀
Tom Sawyer
When we look hard enough, we can find ourselves symptomatic of what Tom Sawyer had demonstrated as a professional trickster. This condition is highly contagious, I guarantee, and not easily reversed.
It's all very well for those of us who make mistakes now and then, like what Tom Sawyer did most of the time. And it's nice