diff --git a/infra/config/config.star b/infra/config/config.star
index 1009d047d5..eb8164cf18 100755
--- a/infra/config/config.star
+++ b/infra/config/config.star
@@ -628,7 +628,7 @@ def perf_builder(name, perf_cat, **kwargs):
     properties = make_goma_properties()
     properties.update(make_reclient_properties("rbe-webrtc-trusted"))
     properties["builder_group"] = "client.webrtc.perf"
-    dimensions = {"pool": "luci.webrtc.perf", "os": "Linux"}
+    dimensions = {"pool": "luci.webrtc.perf", "os": "Linux", "cores": "2"}
     if "Android" in name:
         # Android perf testers require more performant bots to finish under 3 hours.
         dimensions["cores"] = "8"
diff --git a/infra/config/cr-buildbucket.cfg b/infra/config/cr-buildbucket.cfg
index 11830e2944..7003daf32b 100644
--- a/infra/config/cr-buildbucket.cfg
+++ b/infra/config/cr-buildbucket.cfg
@@ -2890,6 +2890,7 @@ buckets {
       name: "Perf Fuchsia"
       swarming_host: "chromium-swarm.appspot.com"
       swarming_tags: "vpython:native-python-wrapper"
+      dimensions: "cores:2"
       dimensions: "os:Linux"
       dimensions: "pool:luci.webrtc.perf"
       exe {
@@ -2939,6 +2940,7 @@ buckets {
       name: "Perf Linux Bionic"
       swarming_host: "chromium-swarm.appspot.com"
       swarming_tags: "vpython:native-python-wrapper"
+      dimensions: "cores:2"
       dimensions: "os:Linux"
       dimensions: "pool:luci.webrtc.perf"
       exe {
@@ -2988,6 +2990,7 @@ buckets {
       name: "Perf Mac 11"
       swarming_host: "chromium-swarm.appspot.com"
       swarming_tags: "vpython:native-python-wrapper"
+      dimensions: "cores:2"
       dimensions: "os:Linux"
       dimensions: "pool:luci.webrtc.perf"
       exe {
@@ -3037,6 +3040,7 @@ buckets {
       name: "Perf Mac M1 Arm64 12"
       swarming_host: "chromium-swarm.appspot.com"
       swarming_tags: "vpython:native-python-wrapper"
+      dimensions: "cores:2"
       dimensions: "os:Linux"
       dimensions: "pool:luci.webrtc.perf"
       exe {
@@ -3086,6 +3090,7 @@ buckets {
       name: "Perf Win7"
       swarming_host: "chromium-swarm.appspot.com"
       swarming_tags: "vpython:native-python-wrapper"
+      dimensions: "cores:2"
       dimensions: "os:Linux"
       dimensions: "pool:luci.webrtc.perf"
       exe {