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What do number conversions cost?

By Meeting C++ | Mar 17, 2023 03:10 AM | Tags: performance meetingcpp intermediate c++20 c++17 basics

Exploring how much number conversions from string cost you and how caching helps

What do number conversions cost?

by Jens Weller

From the article:

And so the devil said: "what if there is an easier design AND implementation?"

In the last two blog posts I've been exploring some of the ways to implement a certain type that has a string_view and holds a conversion to a type in a variant or any. And my last blog post touched on conversions. And that made me wonder, what if I did not have a cache in the type for conversions? The memory foot print would be much smaller, and implementation could be simple to convert in a toType function on demand. This then would essentially be a type that holds a string_view, but offers ways to convert this view to a type. Adding a cache to hold the converted value is in this case not necessary, as this is done on demand.

The Toggle Builder -- Marco Arena

By Marco Arena | Feb 1, 2023 11:44 PM | Tags: intermediate design c++20

The toggle builderThat little extra we might equip builder classes with:

The Toggle Builder

by Marco Arena

From the article:

If intended for general usage, the builder can result a bit uncomfortable when we go through some configuration object to toggle features. This often leads to a bunch of ifs..

About conditional breakpoints

By Meeting C++ | Aug 18, 2022 07:11 AM | Tags: performance intermediate debugging debug basics advanced

A post on conditional breakpoints, including two surveys about their usage.

About conditional brealkpoits

by Jens Weller

From the article:

A few weeks ago someone asked me for advice on finding a specific bug in a larger C++ code base...

I don't remember much of the details, but one of the challenges was that at least some of the code based used public members, and in order to find the bug a change in these members is what they wanted to understand. Adding out put statements into a setter function wasn't possible, as the code did not have those. My suggestion was using a conditional breakpoint. And it also made me curious, if and how they're used with in our community.

Talks and Speaker for Meeting C++ 2022 released

By Meeting C++ | Aug 11, 2022 02:19 AM | Tags: meetingcpp intermediate conference community c++20 c++17 basics advanced

Since yesterday its possible to have a first look at the program of Meeting C++ 2022

A first view on the talks and speakers of Meeting C++ 2022

by Jens Weller

From the article:

I'm excited to release this update for Meeting C++ 2022: the talks and speakers for this years conference!

As you can see in the talk listing, this is still an ongoing process, getting the speaker pictures from the new speakers for this year will still take a while. Creating the schedule will also take a few weeks, as of now Tracks A and B are planned on site, with Tracks C and D being part of the online part.

Porting my first application from Qt5 to Qt6

By Meeting C++ | Jul 22, 2022 03:00 AM | Tags: qt meetingcpp intermediate c++17 basics

An overview on the issues face when porting my first application to Qt6

Porting my first Application from Qt5 to Qt6

by Jens Weller

From the article:

Just this week I had the opportunity to recompile one of my Qt Applications to build it with Qt6. Here is some of the results.

The application in question manages parts of the conference, and hence is written in Qt for the UI and uses SQLite as datastorage, so Qt also used for this and as I learned for a few other things too...