On Thu Apr 1, 2021 at 4:45 PM -03, Sharan Guhan wrote:
> r := regexp.MustCompile(`Core Count: [0-9]+`)
> match := r.FindAllStringSubmatch(cmd_output, -1)
As of the "efficiently" part, you should compile the regexp once
instead of each call to ParseFillCpuInfo, a common practice is to use
a package-level scoped variable but even better (for efficiency) would
be keep it with strings.Index approach, as such:
count := -1
const substr = "Core Count: "
if i := strings.Index(input, substr); i >= 0 {
countStart := i + len(substr)
const digits = "0123456789"
j := 0
for strings.ContainsRune(digits, rune(input[countStart+j])) {
j++
}
count, err := strconv.Atoi(input[countStart : countStart+j])
// handle err
}
You can benchmark both approaches using testing.B, have fun.
https://golang.org/pkg/testing/#B
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