Generate lots of IPs, pretty quickly.
$ ipgen -h
Usage: ./ipgen [options]
Generates random IPv4 addresses and writes them to a stream
Version: 0.1.0
-6 Generate IPv6 addresses instead of IPv4 addresses (default: false)
-n int
Number of IPs to generate. -1 means infinite (default -1)
-o string
Output path for the generated data (default "-")
-x string
IP ranges to exclude from the generated data (format: range,range,range)$ ./ipgen | pv > /dev/null
378MiB 0:00:09 [41.5MiB/s] [ <=> ]Specs:
| Component | Spec |
|---|---|
| CPU | Apple M1 Max |
| Arch | arm64 |
| RAM | 64GB DDR4 |
| OS | macOS Monterey 12.6.5 |
| Go | 1.21.4 |
$ hyperfine --warmup 3 "./ipgen -n 1000000 -o ips.txt" "./ipgen -n 1000000 -o ips.txt -x 192.168.0.0/16,10.0.0.0/16" "./ipgen -6 -n 1000000 -o ips.txt" "./ipgen -6 -n 1000000 -o ips.txt -x 192.168.0.0/16,10.0.0.0/16"
Benchmark 1: ./ipgen -n 1000000 -o ips.txt
Time (mean ± σ): 326.4 ms ± 5.7 ms [User: 199.8 ms, System: 127.4 ms]
Range (min … max): 321.6 ms … 341.4 ms 10 runs
Benchmark 2: ./ipgen -n 1000000 -o ips.txt -x 192.168.0.0/16,10.0.0.0/16
Time (mean ± σ): 332.8 ms ± 1.6 ms [User: 207.5 ms, System: 126.3 ms]
Range (min … max): 330.9 ms … 336.2 ms 10 runs
Benchmark 3: ./ipgen -6 -n 1000000 -o ips.txt
Time (mean ± σ): 392.7 ms ± 1.5 ms [User: 255.8 ms, System: 140.3 ms]
Range (min … max): 390.3 ms … 394.6 ms 10 runs
Benchmark 4: ./ipgen -6 -n 1000000 -o ips.txt -x 192.168.0.0/16,10.0.0.0/16
Time (mean ± σ): 401.7 ms ± 2.3 ms [User: 265.2 ms, System: 140.3 ms]
Range (min … max): 399.4 ms … 406.4 ms 10 runs
Summary
./ipgen -n 1000000 -o ips.txt ran
1.02 ± 0.02 times faster than ./ipgen -n 1000000 -o ips.txt -x 192.168.0.0/16,10.0.0.0/16
1.20 ± 0.02 times faster than ./ipgen -6 -n 1000000 -o ips.txt
1.23 ± 0.02 times faster than ./ipgen -6 -n 1000000 -o ips.txt -x 192.168.0.0/16,10.0.0.0/16