Merge pull request #26584 from aaronlehmann/rate-limit-progress-bar

progress: Rate limit progress bar output

pkg/progress/progressreader.go

@@ -2,6 +2,9 @@ package progress
 
 import (
 	"io"
+	"time"
+
+	"golang.org/x/time/rate"
 )
 
 // Reader is a Reader with progress bar.
@@ -13,6 +16,7 @@ type Reader struct {
 	lastUpdate  int64
 	id          string
 	action      string
+	rateLimiter *rate.Limiter
 }
 
 // NewProgressReader creates a new ProgressReader.
@@ -23,6 +27,7 @@ func NewProgressReader(in io.ReadCloser, out Output, size int64, id, action stri
 		size:        size,
 		id:          id,
 		action:      action,
+		rateLimiter: rate.NewLimiter(rate.Every(100*time.Millisecond), 1),
 	}
 }
 
@@ -55,5 +60,7 @@ func (p *Reader) Close() error {
 }
 
 func (p *Reader) updateProgress(last bool) {
+	if last || p.current == p.size || p.rateLimiter.Allow() {
 		p.out.WriteProgress(Progress{ID: p.id, Action: p.action, Current: p.current, Total: p.size, LastUpdate: last})
 	}
+}