diff --git a/datasets/pgc/systests/arcticdem_mosaic_serial_vs_batch_perf.lua b/datasets/pgc/systests/arcticdem_mosaic_serial_vs_batch_perf.lua
new file mode 100644
index 000000000..34eff2c88
--- /dev/null
+++ b/datasets/pgc/systests/arcticdem_mosaic_serial_vs_batch_perf.lua
@@ -0,0 +1,143 @@
+local console = require("console")
+local asset = require("asset")
+local csv = require("csv")
+local json = require("json")
+
+-- console.monitor:config(core.LOG, core.DEBUG)
+-- sys.setlvl(core.LOG, core.DEBUG)
+
+local assets = asset.loaddir()
+
+-- Setup --
+
+local failedSamples = 0
+
+-- Generate arrays for lons, lats, and heights
+local function generatePointArrays(startLon, stopLon, lat, height, maxPoints)
+    local lons = {}
+    local lats = {}
+    local heights = {}
+
+    local step = (stopLon - startLon) / (maxPoints - 1)
+    for i = 1, maxPoints do
+        table.insert(lons, startLon + (i - 1) * step)
+        table.insert(lats, lat)
+        table.insert(heights, height)
+    end
+
+    return lons, lats, heights
+end
+
+local verbose = true
+local failedSamplesSerial = 0
+local failedSamplesBatch = 0
+
+local lat = 66.34 -- Arctic Circle latitude
+local height = 0  -- Always zero for this test
+
+local startLon  = 100.0
+local stopLon   = 160.0
+local maxPoints = 10^6 -- Total number of points
+
+local lons, lats, heights = generatePointArrays(startLon, stopLon, lat, height, maxPoints)
+
+print(string.format("\n------------------------------------\nMosaics serial reading %d points along arctic circle, longitude range (%.2f to %.2f)\n------------------------------------", maxPoints, startLon, stopLon))
+
+-- Capture results from serial sampling
+local serialResults = {}
+local dem = geo.raster(geo.parms({ asset = "arcticdem-mosaic", algorithm = "NearestNeighbour", radius = 0 }))
+
+local starttimeSerial = time.latch()
+local intervaltime = starttimeSerial
+local modulovalue = maxPoints / 20
+
+for i = 1, maxPoints do
+    local tbl, err = dem:sample(lons[i], lats[i], heights[i])
+    if err ~= 0 then
+        failedSamplesSerial = failedSamplesSerial + 1
+        print(string.format("Serial: Point: %d, (%.2f, %.2f) ======> FAILED to read", i, lons[i], lats[i]))
+        table.insert(serialResults, nil)
+    else
+        table.insert(serialResults, tbl)
+    end
+
+    if verbose then
+        if (i % modulovalue == 0) then
+            local midtime = time.latch()
+            local dtime = midtime - intervaltime
+            local firstSample = tbl[1]
+            local el = firstSample["value"]
+            print(string.format("Point: %7d sampled at (%.2f, %.2f), elevation: %7.2fm, %d points interval time: %5.2f", i, lons[i], lats[i], el, modulovalue, dtime))
+            intervaltime = time.latch()
+        end
+    end
+end
+
+local stoptimeSerial = time.latch()
+local dtimeSerial = stoptimeSerial - starttimeSerial
+print(string.format("Serial sampling: %d points read, time: %f, failed reads: %d", maxPoints, dtimeSerial, failedSamplesSerial))
+
+-- Capture results from batch sampling
+local batchResults = {}
+local starttimeBatch = time.latch()
+
+print(string.format("\n------------------------------------\nMosaics bathc reading %d points along arctic circle, longitude range (%.2f to %.2f)\n------------------------------------", maxPoints, startLon, stopLon))
+local tbl, err = dem:batchsample(lons, lats, heights)
+if err ~= 0 then
+    print("Batch sampling failed")
+else
+    batchResults = tbl
+end
+
+local stoptimeBatch = time.latch()
+local dtimeBatch = stoptimeBatch - starttimeBatch
+print(string.format("Batch sampling: %d points read, time: %f, failed reads: %d", maxPoints, dtimeBatch, failedSamplesBatch))
+
+-- Compare serial and batch results
+print("\n------------------------------------\nComparing Serial and Batch Results\n------------------------------------")
+local totalMismatches = 0
+local totalFailedSerial = 0
+local totalFailedBatch = 0
+
+for i = 1, maxPoints do
+    local serialSample = serialResults[i]
+    local batchSample = batchResults[i]
+
+    if (serialSample == nil and batchSample == nil) then
+        -- Both failed
+        totalFailedSerial = totalFailedSerial + 1
+        totalFailedBatch = totalFailedBatch + 1
+        print(string.format("Point %d: Both methods failed", i))
+    elseif (serialSample == nil) then
+        -- Serial failed
+        totalFailedSerial = totalFailedSerial + 1
+        totalMismatches = totalMismatches + 1
+        print(string.format("Point %d: Serial failed, Batch succeeded", i))
+    elseif (batchSample == nil) then
+        -- Batch failed
+        totalFailedBatch = totalFailedBatch + 1
+        totalMismatches = totalMismatches + 1
+        print(string.format("Point %d: Batch failed, Serial succeeded", i))
+    else
+        -- Compare values
+        for j, serialValue in ipairs(serialSample) do
+            local batchValue = batchSample[j]
+            if not batchValue or math.abs(serialValue["value"] - batchValue["value"]) > 1e-6 then
+                totalMismatches = totalMismatches + 1
+                print(string.format("Point %d, Sample %d: Serial %.6f != Batch %.6f", i, j, serialValue["value"], batchValue["value"]))
+            end
+        end
+    end
+end
+
+-- Print summary
+print("\n------------------------------------\nPerformance Summary\n------------------------------------")
+print(string.format("Total Points: %d", maxPoints))
+print(string.format("Serial Sampling Time: %6.2f seconds", dtimeSerial))
+print(string.format("Batch Sampling Time:  %6.2f seconds", dtimeBatch))
+print(string.format("Speedup (Serial/Batch): %.2fx", dtimeSerial / dtimeBatch))
+print(string.format("Failed Points (Serial): %d", totalFailedSerial))
+print(string.format("Failed Points (Batch):  %d", totalFailedBatch))
+print(string.format("Mismatched Points:      %d", totalMismatches))
+
+sys.quit()
\ No newline at end of file
diff --git a/targets/slideruleearth-aws/Makefile b/targets/slideruleearth-aws/Makefile
index 79c99027a..ce9e71cdb 100644
--- a/targets/slideruleearth-aws/Makefile
+++ b/targets/slideruleearth-aws/Makefile
@@ -339,6 +339,8 @@ MOSAICS_PERFORMANCE_TEST ?= $(ROOT)/datasets/pgc/systests/arcticdem_mosaic_perf.
 STRIPS_PERFORMANCE_TEST ?=  $(ROOT)/datasets/pgc/systests/arcticdem_strips_perf.lua
 SUBSET_PERFORMANCE_TEST ?=  $(ROOT)/scripts/systests/subset_perf_test.lua
 
+MOSAICS_SERIAL_VS_BATCH_PERFORMANCE_TEST ?= $(ROOT)/datasets/pgc/systests/arcticdem_mosaic_serial_vs_batch_perf.lua
+
 selftest: ## run the self test on the server code
 	$(SLIDERULE_STAGE_DIR)/bin/sliderule $(TEST)
 
@@ -354,6 +356,9 @@ perfstest: ## run strips performance test on the server code
 perfsubsetest: ## run subset performance test
 	$(SLIDERULE_STAGE_DIR)/bin/sliderule $(SUBSET_PERFORMANCE_TEST)
 
+perfmsbtest: ## run mosaics serial and batch performance test for 1 million points comparing results
+	$(SLIDERULE_STAGE_DIR)/bin/sliderule $(MOSAICS_SERIAL_VS_BATCH_PERFORMANCE_TEST)
+
 OCEANEYES_SHARE=/data/AppServer.1
 oceaneyes-test: ## run oceaneyes
 	docker run -it --rm -v /data:/data -v $(OCEANEYES_SHARE):/share --name oceaneyes $(ECR)/oceaneyes:$(VERSION) /bin/bash /runner.sh $(OCEANEYES_SHARE)/settings.json