Posts Tagged ‘performance’Recently,I have rewritten the logging engine for LogMicroscope,using circular-buffer in log writing threads,and WriteFileGather in file writing thread to gathers up the data from these discrete buffers in memory and transfers them "in place" as a single operation.
First,download and install the FastCgi Extension for IIS 6 from microsoft.The FastCGI protocol enables PHP applications to be hosted on the IIS web server in a high-performance and reliable way.FastCGI re-uses CGI processes for multiple requests, which provides a significant performance boost as compared to CGI.
最近需要一个高性能的hash实现，对比了很多实现hash表的源代码，主要区别在于冲突检测的实现方式。
关于冲突检测的两种方式的对比(chaining and open addressing)：
http://www.absoluteastronomy.com/enc1/hash_table
Google有一个高效的实现Open addressing hash 的开源项目
http://goog-sparsehash.sourceforge.net/
Open addressing的性能可能会更好些，但是前提是需要一个非常好的hash生成算法。如果使用Chaining方式，加上一个非常高效的memory pool管理，减少cache失效时间，平均性能应该和Open addressing差不多。