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perf: pre-compile regex patterns for GPU usage parsing

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This commit is contained in:
bsisduck
2025-12-07 18:39:23 +01:00
parent 32ac98f06a
commit 124a6975d4
2 changed files with 8 additions and 4 deletions
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12
cmd/status/metrics_gpu.go
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@@ -17,6 +17,12 @@ const (
powermetricsTimeout = 2 * time.Second
)
// Pre-compiled regex patterns for GPU usage parsing
var (
gpuActiveResidencyRe = regexp.MustCompile(`GPU HW active residency:\s+([\d.]+)%`)
gpuIdleResidencyRe = regexp.MustCompile(`GPU idle residency:\s+([\d.]+)%`)
)
func (c *Collector) collectGPU(now time.Time) ([]GPUStatus, error) {
if runtime.GOOS == "darwin" {
// Get static GPU info (cached for 10 min)
@@ -159,8 +165,7 @@ func getMacGPUUsage() float64 {
}
// Parse "GPU HW active residency: X.XX%"
re := regexp.MustCompile(`GPU HW active residency:\s+([\d.]+)%`)
matches := re.FindStringSubmatch(out)
matches := gpuActiveResidencyRe.FindStringSubmatch(out)
if len(matches) >= 2 {
usage, err := strconv.ParseFloat(matches[1], 64)
if err == nil {
@@ -169,8 +174,7 @@ func getMacGPUUsage() float64 {
}
// Fallback: parse "GPU idle residency: X.XX%" and calculate active
reIdle := regexp.MustCompile(`GPU idle residency:\s+([\d.]+)%`)
matchesIdle := reIdle.FindStringSubmatch(out)
matchesIdle := gpuIdleResidencyRe.FindStringSubmatch(out)
if len(matchesIdle) >= 2 {
idle, err := strconv.ParseFloat(matchesIdle[1], 64)
if err == nil {