extremely basic comparison of regex in different languages.
Performed the following regular expression '\d+' on 100 lines of text (each containing text and 4 numbers). This was repeated 100.000 times.
Each found number was summed up to receive a total of all the iterations, to validate result.
These result show elapsed time for just a single regular expression example, so please do not take the numbers as a benchmark of the different languages/options.
| option | time | version | mem. bytes (max.resident set size) | mem. bytes(peak memory footprint) | bin.size | remarks |
|---|---|---|---|---|---|---|
| PyPy | 6.42s | 7.3.1 with GCC | 41.349.120 | 34.197.504 | - | |
| V (pcre) | 7.72s | 0.2 (f7787ff) | 1.301.581.824 | 1.300.992.000 | 35KB | compiled with -prod |
| Crystal | 8.77s | 0.35.1 (LLVM 9.0.1) | 3.235.840 | 2.342.912 | 403KB | compiled with --release |
| Go | 11.80s | 1.15.5 | 10.051.584 | 7.196.672 | 2.4MB | |
| V (pcre) AF | 13.52s | 0.2 (f7787ff) | 3.577.479.168 | 3.576.889.344 | 35KB | compiled with -prod -autofree |
| V (regex) | 17.28s | 0.2 (f7787ff) | 2.845.835.264 | 2.845.364.224 | 65KB | compiled with -prod |
| V (regex) AF | 18.31s | 0.2 (f7787ff) | 1.301.434.368 | 1.300.963.328 | 65KB | compiled with -prod -autofree |
| Python | 28.72s | 3.8.2 | 6.991.872 | 4.620.288 | - |
import regex
const (
inputs = [
'departure location: 43-237 or 251-961',
'departure station: 27-579 or 586-953',
'departure platform: 31-587 or 608-967',
'departure track: 26-773 or 784-973',
'departure date: 41-532 or 552-956',
'departure time: 33-322 or 333-972',
'arrival location: 30-165 or 178-965',
'arrival station: 31-565 or 571-968',
'arrival platform: 36-453 or 473-963',
'arrival track: 35-912 or 924-951',
'class: 39-376 or 396-968',
'duration: 31-686 or 697-974',
'price: 28-78 or 96-971',
'route: 32-929 or 943-955',
'row: 40-885 or 896-968',
'seat: 26-744 or 765-967',
'train: 46-721 or 741-969',
'type: 30-626 or 641-965',
'wagon: 48-488 or 513-971',
'zone: 34-354 or 361-973',
'departure location: 43-237 or 251-961',
'departure station: 27-579 or 586-953',
'departure platform: 31-587 or 608-967',
'departure track: 26-773 or 784-973',
'departure date: 41-532 or 552-956',
'departure time: 33-322 or 333-972',
'arrival location: 30-165 or 178-965',
'arrival station: 31-565 or 571-968',
'arrival platform: 36-453 or 473-963',
'arrival track: 35-912 or 924-951',
'class: 39-376 or 396-968',
'duration: 31-686 or 697-974',
'price: 28-78 or 96-971',
'route: 32-929 or 943-955',
'row: 40-885 or 896-968',
'seat: 26-744 or 765-967',
'train: 46-721 or 741-969',
'type: 30-626 or 641-965',
'wagon: 48-488 or 513-971',
'zone: 34-354 or 361-973',
'departure location: 43-237 or 251-961',
'departure station: 27-579 or 586-953',
'departure platform: 31-587 or 608-967',
'departure track: 26-773 or 784-973',
'departure date: 41-532 or 552-956',
'departure time: 33-322 or 333-972',
'arrival location: 30-165 or 178-965',
'arrival station: 31-565 or 571-968',
'arrival platform: 36-453 or 473-963',
'arrival track: 35-912 or 924-951',
'class: 39-376 or 396-968',
'duration: 31-686 or 697-974',
'price: 28-78 or 96-971',
'route: 32-929 or 943-955',
'row: 40-885 or 896-968',
'seat: 26-744 or 765-967',
'train: 46-721 or 741-969',
'type: 30-626 or 641-965',
'wagon: 48-488 or 513-971',
'zone: 34-354 or 361-973',
'departure location: 43-237 or 251-961',
'departure station: 27-579 or 586-953',
'departure platform: 31-587 or 608-967',
'departure track: 26-773 or 784-973',
'departure date: 41-532 or 552-956',
'departure time: 33-322 or 333-972',
'arrival location: 30-165 or 178-965',
'arrival station: 31-565 or 571-968',
'arrival platform: 36-453 or 473-963',
'arrival track: 35-912 or 924-951',
'class: 39-376 or 396-968',
'duration: 31-686 or 697-974',
'price: 28-78 or 96-971',
'route: 32-929 or 943-955',
'row: 40-885 or 896-968',
'seat: 26-744 or 765-967',
'train: 46-721 or 741-969',
'type: 30-626 or 641-965',
'wagon: 48-488 or 513-971',
'zone: 34-354 or 361-973',
'departure location: 43-237 or 251-961',
'departure station: 27-579 or 586-953',
'departure platform: 31-587 or 608-967',
'departure track: 26-773 or 784-973',
'departure date: 41-532 or 552-956',
'departure time: 33-322 or 333-972',
'arrival location: 30-165 or 178-965',
'arrival station: 31-565 or 571-968',
'arrival platform: 36-453 or 473-963',
'arrival track: 35-912 or 924-951',
'class: 39-376 or 396-968',
'duration: 31-686 or 697-974',
'price: 28-78 or 96-971',
'route: 32-929 or 943-955',
'row: 40-885 or 896-968',
'seat: 26-744 or 765-967',
'train: 46-721 or 741-969',
'type: 30-626 or 641-965',
'wagon: 48-488 or 513-971',
'zone: 34-354 or 361-973',
]
)
fn main() {
pattern := r'\d+'
mut re := regex.regex_opt(pattern) or { panic(err) }
mut total := u64(0)
for _ in 0 .. 100000 {
for input in inputs {
idxs := re.find_all(input)
for i := 0; i < idxs.len; i += 2 {
total += input[idxs[i]..idxs[i + 1]].u64()
}
}
}
println(total)
}
// 21159000000
// ./regex_digit 20.68s user 0.91s system 99% cpu 21.759 total