diff --git a/ci/run-performance-tests.ps1 b/ci/run-performance-tests.ps1
index 53e82b40..af0f5d9c 100644
--- a/ci/run-performance-tests.ps1
+++ b/ci/run-performance-tests.ps1
@@ -14,7 +14,20 @@ try
     $perfSummary = New-Item -ItemType directory -Path test-results/performance-summary -Force
     $perfJSONOutputName = "results_$Name.json";
 
-    node fiftyone.devicedetection.onpremise/examples/onpremise/performance-console/performance.js --jsonoutput $perfJSONOutputName || $($testsFailed = $true)
+    # Pass the TAC data file explicitly, so the graph is measured with the full
+    # data file rather than whichever file the example's folder search finds
+    # first. Without a license key the TAC file isn't downloaded, and the
+    # example falls back to its default Lite data file.
+    $dataFile = 'fiftyone.devicedetection.onpremise/device-detection-cxx/device-detection-data/Enterprise-HashV41.hash'
+    $dataFileArgs = @()
+    if (Test-Path $dataFile) {
+        $dataFileArgs = '--datafile', $dataFile
+    }
+    else {
+        Write-Warning "No TAC data file at '$dataFile', so the example uses its default data file"
+    }
+
+    node fiftyone.devicedetection.onpremise/examples/onpremise/performance-console/performance.js @dataFileArgs --jsonoutput $perfJSONOutputName || $($testsFailed = $true)
 
     Write-Output "Path to performance results - /"