diff --git a/.github/workflows/evalml_main_performance_tests.yaml b/.github/workflows/evalml_main_performance_tests.yaml
deleted file mode 100644
index e5c7e818b1..0000000000
--- a/.github/workflows/evalml_main_performance_tests.yaml
+++ /dev/null
@@ -1,175 +0,0 @@
-name: Run looking glass performance tests
-
-on:
-  push:
-    branches:
-      - main
-
-jobs:
-  performance_tests:
-    name: Run looking glass performance tests
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: true
-    env:
-      AWS_ACCESS_KEY_ID: ${{ secrets.AWS_SECRET_ACCESS_KEY_ID }}
-      AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
-      AWS_DEFAULT_REGION: 'us-east-1'
-      AWS_SESSION_TOKEN: ""
-    steps:
-      - name: Checkout evalml
-        uses: actions/checkout@v3
-        with:
-          fetch-depth: 2
-      - name: Get commit hashes
-        id: get_hashes
-        run: |
-          current_hash=$(git rev-parse --short HEAD)
-          echo "Latest commit hash: $current_hash"
-          echo "::set-output name=current_hash::$current_hash"
-          previous_hash=$(git rev-parse --short HEAD~1)
-          echo "Previous commit hash: $previous_hash"
-          echo "::set-output name=previous_hash::$previous_hash"
-      - name: Set up Python 3.8
-        uses: actions/setup-python@v4
-        with:
-          python-version: "3.8"
-      - name: Checkout looking glass
-        uses: actions/checkout@v3
-        with:
-          repository: alteryx/looking-glass
-          ref: master
-          token: ${{ secrets.LOOKING_GLASS_TOKEN }}
-      - name: Installing Dependencies
-        run: |
-          make installdeps
-          make installdeps-test
-      - name: Run default algorithm performance test (current)
-        id: current_default
-        run: |
-          response=$( looking-glass run-evalml-automl --username machineFL --automl-algo default --scenarios-yaml release.yaml --evalml-branch ${{ steps.get_hashes.outputs.current_hash }} --job-desc ${{ steps.get_hashes.outputs.current_hash }}_default )
-          echo "::set-output name=job_id::$(echo $response | sed 's/.*Job ID: \([^ ]*\).*/\1/')"
-      - name: Run iterative algorithm performance test (current)
-        id: current_iterative
-        run: |
-          response=$( looking-glass run-evalml-automl --username machineFL --automl-algo iterative --scenarios-yaml release.yaml --evalml-branch ${{ steps.get_hashes.outputs.current_hash }} --job-desc ${{ steps.get_hashes.outputs.current_hash }}_iterative )
-          echo "::set-output name=job_id::$(echo $response | sed 's/.*Job ID: \([^ ]*\).*/\1/')"
-      - name: Run default algorithm performance test (previous)
-        id: previous_default
-        run: |
-          response=$( looking-glass run-evalml-automl --username machineFL --automl-algo default --scenarios-yaml release.yaml --evalml-branch ${{ steps.get_hashes.outputs.previous_hash }} --job-desc ${{ steps.get_hashes.outputs.previous_hash }}_default )
-          echo "::set-output name=job_id::$(echo $response | sed 's/.*Job ID: \([^ ]*\).*/\1/')"
-      - name: Run iterative algorithm performance test (previous)
-        id: previous_iterative
-        run: |
-          response=$( looking-glass run-evalml-automl --username machineFL --automl-algo iterative --scenarios-yaml release.yaml --evalml-branch ${{ steps.get_hashes.outputs.previous_hash }} --job-desc ${{ steps.get_hashes.outputs.previous_hash }}_iterative )
-          echo "::set-output name=job_id::$(echo $response | sed 's/.*Job ID: \([^ ]*\).*/\1/')"
-      - name: Await results
-        id: results
-        run: |
-          for id in ${{ steps.current_default.outputs.job_id }} ${{ steps.current_iterative.outputs.job_id }} ${{ steps.previous_default.outputs.job_id }} ${{ steps.previous_iterative.outputs.job_id }}; do
-            echo "Waiting for job id: $id"
-            result=''
-            sleep_time=0
-            while [ -z "$result"  ]
-            do
-              sleep $sleep_time
-              result=$(looking-glass get-job --job-id $id | grep -n 'COMPLETED' || :;)
-              sleep_time=60
-            done
-            looking-glass get-results --job-id $id --file-path $id
-          done
-        shell: bash
-      - name: Generate reports
-        run: |
-          filename_base=${{ steps.get_hashes.outputs.current_hash }}_v_${{ steps.get_hashes.outputs.previous_hash }}
-          looking-glass run-local-report --previous-path ${{ steps.previous_default.outputs.job_id }} -n ${{ steps.current_default.outputs.job_id }} --output-name ${filename_base}_default --output-type html
-          looking-glass run-local-report --previous-path ${{ steps.previous_iterative.outputs.job_id }} -n ${{ steps.current_iterative.outputs.job_id }} --output-name ${filename_base}_iterative --output-type html
-      - name: Upload reports to S3
-        id: s3_upload
-        run: |
-          filename_base=${{ steps.get_hashes.outputs.current_hash }}_v_${{ steps.get_hashes.outputs.previous_hash }}
-          default_url=s3://evalml-main-looking-glass-reports/${filename_base}_default.html
-          aws s3 cp ./${filename_base}_default.html $default_url
-          echo "::set-output name=default_report_url::$default_url"
-          echo "Default Algorith Report: $default_url"
-          iterative_url=s3://evalml-main-looking-glass-reports/${filename_base}_iterative.html
-          aws s3 cp ./${filename_base}_iterative.html $iterative_url
-          echo "::set-output name=iterative_report_url::$iterative_url"
-          echo "Iterative Algorith Report: $iterative_url"
-      - name: Notify on Slack
-        run: |
-          filename_base=${{ steps.get_hashes.outputs.current_hash }}_v_${{ steps.get_hashes.outputs.previous_hash }}
-          presigned_default_url=$( aws s3 presign ${{ steps.s3_upload.outputs.default_report_url }} --expires-in 604800 )
-          presigned_iterative_url=$( aws s3 presign ${{ steps.s3_upload.outputs.iterative_report_url }} --expires-in 604800 )
-          response=$(
-          curl -X POST https://slack.com/api/chat.postMessage -H 'Content-type: application/json;charset=UTF-8' -H 'Authorization: Bearer ${{ secrets.LG_SLACK_TOKEN }}' \
-          --data-binary @- << EOF
-          {
-            "channel": "C042B5JBBPF",
-            "blocks": [
-              {
-                "type": "section",
-                "text": {
-                  "type": "mrkdwn",
-                  "text": "<!subteam^${{ secrets.LG_SLACK_NOTIFICATION_USER_GROUP }}>, performance tests for latest commit on evalml are complete"
-                }
-              },
-              {
-                "type": "section",
-                "text": {
-                  "type": "mrkdwn",
-                  "text": "*Author*: ${{ github.event.head_commit.author.name }}"
-                }
-              },
-              {
-                "type": "section",
-                "fields": [
-                  {
-                    "type": "mrkdwn",
-                    "text": "*Current Commit*: <${{ github.event.head_commit.url }}|${{ steps.get_hashes.outputs.current_hash }}>"
-                  },
-                  {
-                    "type": "mrkdwn",
-                    "text": "*Previous Commit*: <https://github.com/alteryx/evalml/commit/${{ steps.get_hashes.outputs.previous_hash }}|${{ steps.get_hashes.outputs.previous_hash }}>"
-                  },
-                  {
-                    "type": "mrkdwn",
-                    "text": "*Current Default Algo Job*: ${{ steps.current_default.outputs.job_id }}"
-                  },
-                  {
-                    "type": "mrkdwn",
-                    "text": "*Previous Default Algo Job*: ${{ steps.previous_default.outputs.job_id }}"
-                  },
-                  {
-                    "type": "mrkdwn",
-                    "text": "*Current Iterative Algo Job*: ${{ steps.current_iterative.outputs.job_id }}"
-                  },
-                  {
-                    "type": "mrkdwn",
-                    "text": "*Previous Iterative Algo Job*: ${{ steps.previous_iterative.outputs.job_id }}"
-                  },
-                ]
-              },
-              {
-                "type": "section",
-                "text": {
-                  "type": "mrkdwn",
-                  "text": "*Default Algorithm Report*: <$presigned_default_url|${{ steps.s3_upload.outputs.default_report_url }}>"
-                }
-              },
-              {
-                "type": "section",
-                "text": {
-                  "type": "mrkdwn",
-                  "text": "*Iterative Algorithm Report*: <$presigned_iterative_url|${{ steps.s3_upload.outputs.iterative_report_url }}>"
-                }
-              }
-            ]
-          }
-          EOF
-          )
-          echo $response
-          ts=$(echo $response | jq .ts)
-          curl -F "file=@${filename_base}_default.html" -F channels=C042B5JBBPF -F 'thread_ts=$ts' -H 'Authorization: Bearer ${{ secrets.LG_SLACK_TOKEN }}'  https://slack.com/api/files.upload
-          curl -F "file=@${filename_base}_iterative.html" -F channels=C042B5JBBPF -F 'thread_ts=$ts' -H 'Authorization: Bearer ${{ secrets.LG_SLACK_TOKEN }}'  https://slack.com/api/files.upload
diff --git a/docs/source/release_notes.rst b/docs/source/release_notes.rst
index 81a1ca32dc..2a6e75f671 100644
--- a/docs/source/release_notes.rst
+++ b/docs/source/release_notes.rst
@@ -15,6 +15,7 @@ Release Notes
     * Documentation Changes
         * Removed LightGBM's excessive amount of warnings :pr:`4308`
     * Testing Changes
+        * Removed old performance testing workflow :pr:`4318`
 
 .. warning::