A summary of the use of clickhouse
It is said that clickhouse is a columnar storage database used in olap scenarios with a large amount of data. Fortunately, it can also be used in actual scenarios. Let's talk about the simple experience of using this article.
1. Overall description
Not much about architecture, column storage, large amount of data and high performance. See off ...
Posted by arlabbafi on Fri, 03 Dec 2021 00:26:30 -0800
Android Bitmap related knowledge points - type, creation, compression, conversion, etc
1, Bitmap storage format and memory calculation
When we need to optimize performance or prevent OOM, we usually use RGB_565 this type. Because alpha_ Type 8 bitmap has only transparency and is not very useful. ARGB_4444 the display picture is not clear. ARGB_8888 takes up the most memory space.
BItmap typeMemory occupied by one pixelALPHA ...
Posted by p3rk5 on Wed, 20 Oct 2021 13:07:10 -0700