From 9f1a62783a3be15b596866b0ed029fa5f7b9e0c6 Mon Sep 17 00:00:00 2001
From: Charlie Getzen <charlie.getzen@procore.com>
Date: Mon, 22 Apr 2019 09:54:10 -0700
Subject: [PATCH] batch perform function by resource kind (Deployment, Pod,
 etc)

Signed-off-by: Charlie Getzen <charlie.getzen@procore.com>
---
 pkg/kube/client.go | 28 +++++++++++++++++++++++-----
 1 file changed, 23 insertions(+), 5 deletions(-)

diff --git a/pkg/kube/client.go b/pkg/kube/client.go
index 9f94ea9cd..db8596c98 100644
--- a/pkg/kube/client.go
+++ b/pkg/kube/client.go
@@ -551,11 +551,7 @@ func perform(infos Result, fn ResourceActorFunc) error {
 	}
 
 	errs := make(chan error)
-	for _, info := range infos {
-		go func(i *resource.Info) {
-			errs <- fn(i)
-		}(info)
-	}
+	go batchPerform(infos, fn, errs)
 
 	for range infos {
 		err := <-errs
@@ -566,6 +562,28 @@ func perform(infos Result, fn ResourceActorFunc) error {
 	return nil
 }
 
+func batchPerform(infos Result, fn ResourceActorFunc, errs chan<- error) {
+	finished := make(chan bool, 10000)
+	kind := infos[0].Object.GetObjectKind().GroupVersionKind().Kind
+	counter := 0
+	for _, info := range infos {
+		currentKind := info.Object.GetObjectKind().GroupVersionKind().Kind
+		if kind != currentKind {
+			// Wait until the previous kind has finished
+			for i := 0; i < counter; i++ {
+				<-finished
+			}
+			counter = 0
+			kind = currentKind
+		}
+		counter = counter + 1
+		go func(i *resource.Info) {
+			errs <- fn(i)
+			finished <- true
+		}(info)
+	}
+}
+
 func createResource(info *resource.Info) error {
 	obj, err := resource.NewHelper(info.Client, info.Mapping).Create(info.Namespace, true, info.Object, nil)
 	if err != nil {