GitHub: GoLang/obrc

One Billion Row Challenge in Golang

https://github.com/gunnarmorling/1brc

In:

<station name>;<temperature>

Yellowknife;16.0
Entebbe;32.9
Porto;24.4
Vilnius;12.4
Fresno;7.9
Maun;17.5
Panama City;39.5
...

format <station name>;<temperature>

temperature is a floating-point number ranging from -99.9 to 99.9 with precision limited to one decimal point.

Out:

{Abha=-23.0/18.0/59.2, Abidjan=-16.2/26.0/67.3, Abéché=-10.0/29.4/69.0, ...}

format {<station name>=<min>/<mean/<max>, ...}

The expected output format is sorted alphabetically by station name, and where min, mean and max denote the computed minimum, average and maximum temperature readings for each respective station.

Create sample data

gcc create-sample.c -lm  -o create-sample

Profiling

go run ./obrc -cpuprofile cpu.prof -memprofile mem.prof > /dev/null                                                                                                                                                                         ──(Tue,Mar26)─┘

go tool pprof -http=":8080" ./cpu.prof 

TODO: INCOMPLETE

Recent changes

• 2024-04-18

  b246f5d

  backup

• 2024-04-02

  2cb183c

  added more examples