I got a new MacBook pro with high res display and a solid state drive and for iPhone development. For development tasks the new machine is 2-3 times faster than the old one, and it has enough screen space to comfortably run Xcode and the simulator side by side…
Bottlenecks – disk, cpu, synchronization, etc
April 26, 2008 By 1 Comment
Bottlenecks are the parts of the system that limit performance. The system is made up of multiple parts that can run in parallel, for example the disk can be doing disk IO at the same time as the CPU is running some code, but when the system is at its maximum throughput then one of [...]
MarkJ’s Rules for Good Software Performance
April 21, 2008 By 1 Comment
To get good performance from your software applications your team needs to follow MarkJ’s Rules of Good Software Performance: 1) Measure first and optimize second – find bottlenecks , ie don’t guess where a performance problem might be before you have one, find the slow part of the system through testing. In performance engineering it’s [...]
Scalability and Other Meanings of Performance
April 17, 2008 By Leave a Comment
In Throughput and Response Time I described the essence of what we mean by software performance, but there are some additional meanings that are important to consider in many cases. So here is a bigger list of what we mean when we talk about performance: Response Time Throughput Scalability Stability Resource Utilization, eg memory footprint [...]
Throughput and response time
April 16, 2008 By 2 Comments
What does ‘performance’ mean? Software performance is mostly about how fast the software goes and how much work it can handle. To discuss performance we need more accurate terms than ‘speed’. The two most important concepts are: Response time – how quickly the system responds to request Throughput – how much work can it do [...]
