···

       
5
       
 
       
The One Billion Row Challenge (1BRC) is a fun exploration of how far modern Java can be pushed for aggregating one billion rows from a text file.

     

       
6
       
 
       
Grab all your (virtual) threads, reach out to SIMD, optimize your GC, or pull any other trick, and create the fastest implementation for solving this task!

     

       
7
       
 
       


     

       
0
       
 
       

     

       
0
       
 
       

     

       
8
       
 
       
The text file contains temperature values for a range of weather stations.

     

       
9
       
 
       
Each row is one measurement in the format `<string: station name>;<double: measurement>`.

     

       
10
       
 
       
The following shows ten rows as an example:

     

···

       
5
       
 
       
The One Billion Row Challenge (1BRC) is a fun exploration of how far modern Java can be pushed for aggregating one billion rows from a text file.

     

       
6
       
 
       
Grab all your (virtual) threads, reach out to SIMD, optimize your GC, or pull any other trick, and create the fastest implementation for solving this task!

     

       
7
       
 
       


     

       
8
       
+
       
<img src="1brc.png" alt="1BRC" style="display: block; margin-left: auto; margin-right: auto; margin-bottom:1em; width: 50%;">

     

       
9
       
+
       


     

       
10
       
 
       
The text file contains temperature values for a range of weather stations.

     

       
11
       
 
       
Each row is one measurement in the format `<string: station name>;<double: measurement>`.

     

       
12
       
 
       
The following shows ten rows as an example: