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All posts tagged linux

Speedscope: visualize what your program is doing and where it is spending time

Speedscope: visualize what your program is doing and where it is spending time

Posted on March 13, 2021March 13, 2021Author Ivica BogosavljevićPosted in Developer Tools, PerformanceLeave a Reply

In this post we introduce Speescope, a useful tool to help you visualize what your program is doing and where it is spending time.

RR: The magic of record and replay debugging

RR: The magic of record and replay debugging

Posted on August 16, 2020August 16, 2020Author Ivica BogosavljevićPosted in DebuggingLeave a Reply

Learn about RR, a tool that will change the way you debug. RR will allow you to record bugs once and replay them anywhere. It will also allow you to reverse-execute your program, a feature that will simplify your debugging and your life.

The price of dynamic memory: Allocation

The price of dynamic memory: Allocation

Posted on July 25, 2020August 28, 2020Author Ivica BogosavljevićPosted in PerformanceLeave a Reply

We talk about how to speed up your program if your program is taking time to allocate or release memory.

Lessons in debugging: observe how programs interact with the Linux kernel with STRACE

Lessons in debugging: observe how programs interact with the Linux kernel with STRACE

Posted on July 12, 2020August 16, 2020Author Ivica BogosavljevićPosted in Debugging, Developer ToolsLeave a Reply

There are a subset of problems in software development that can be traced back to system calls or signals. Learn about STRACE, tool that let you trace system calls and signals and that can help you quickly figure out the origin of those problems.

CPU Dispatching: Make your code both portable and fast

CPU Dispatching: Make your code both portable and fast

Posted on June 28, 2020June 28, 2020Author Ivica BogosavljevićPosted in PerformanceLeave a Reply

CPU dispatchingh is all about making your code portable and fast. We will talk about how to make your detect features your CPU has at is disposal and select the fastest function for that particular CPU without a need to recompile your software.

GDB: A quick guide to make your debugging easier

GDB: A quick guide to make your debugging easier

Posted on June 21, 2020July 27, 2020Author Ivica BogosavljevićPosted in Debugging, Developer ToolsLeave a Reply

We will talk about how to profit from some of GDB’s very useful albeit less known features.

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Recent posts

  • Flexibility and Performance
  • Speedscope: visualize what your program is doing and where it is spending time
  • Speeding up an Image Processing Algorithm
  • The true price of virtual functions in C++
  • 2-minute read: Class Size, Member Layout and Speed

About me

Johny’s Software Lab LLC is a software development consulting house specializing in software performance. If you or your developer team needs help on how to make your C or C++ program run faster, or you are missing out important deadlines because of problems with performance, this is the right place to be.

Recent Posts

  • Flexibility and Performance
  • Speedscope: visualize what your program is doing and where it is spending time
  • Speeding up an Image Processing Algorithm
  • The true price of virtual functions in C++
  • 2-minute read: Class Size, Member Layout and Speed

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