first commit

2025-11-17 20:11:26 +07:00 · 2025-11-17 20:11:26 +07:00 · 27e101260c
commit 27e101260c
6 changed files with 547 additions and 0 deletions
--- a/README.md
+++ b/README.md
@ -0,0 +1,17 @@
+## Benchmark Latency and Throughput of Stitcher
+### Benchmark Latency
+0. Have Python installed and the deps : pandas and matplotlib
+1. Go to `cd latency`
+2. Run this in the terminal 
+```
+./request.sh -o <output_location> -u "<backend_url>" -i <iteration> --no-output
+```
+
+### Benchmark Throughput
+0. Have JMetter installed, [download here](https://jmeter.apache.org/download_jmeter.cgi)
+1. Go to `cd throughput`
+2. Run this in the terminal
+```
+./request.sh -o <output_folder> -H "<backend_ip>" -t <num_of_threads> -l <num_of_loops>
+```
+3. outputs will be in the directory specified
--- a/latency/generate_graph.py
+++ b/latency/generate_graph.py
@ -0,0 +1,60 @@
+import argparse
+import pandas as pd
+import matplotlib.pyplot as plt
+
+def shorten_title(title, max_len=12):
+    """Return a shortened title for plotting."""
+    return title if len(title) <= max_len else title[:max_len] + "..."
+
+def main():
+    parser = argparse.ArgumentParser(description="Generate latency graph from CSV.")
+    parser.add_argument("--input", required=True, help="Input CSV file")
+    parser.add_argument("--output", required=True, help="Output PNG path")
+    parser.add_argument("--user", required=True, help="Username for graph title")
+    args = parser.parse_args()
+
+    # Load CSV
+    df = pd.read_csv(args.input)
+
+    # Convert to float
+    df["Latency(s)"] = pd.to_numeric(df["Latency(s)"], errors="coerce")
+    df = df.dropna(subset=["Latency(s)"])
+
+    latencies = df["Latency(s)"].values
+    titles = df["Title"].values
+    short_titles = [shorten_title(t) for t in titles]
+
+    # Compute average
+    avg_latency = latencies.mean()
+
+    plt.figure(figsize=(14, 6))
+
+    # --- Bar chart ---
+    bars = plt.bar(short_titles, latencies)
+
+    # --- Average line ---
+    plt.axhline(y=avg_latency, linestyle="--")
+    plt.text(
+        -0.4, avg_latency,
+        f"Avg = {avg_latency:.3f}s",
+        va="bottom",
+        fontsize=10,
+        fontweight="bold"
+    )
+
+    # --- Label each bar with exact value ---
+    for i, value in enumerate(latencies):
+        plt.text(i, value, f"{value:.3f}", ha="center", va="bottom", fontsize=8)
+
+    plt.xticks(rotation=45, ha="right")
+    plt.xlabel("Name")
+    plt.ylabel("Latency (seconds)")
+    plt.title(f"Latency Performance of {args.user}")
+
+    plt.tight_layout()
+    plt.savefig(args.output)
+
+    print(f"Graph saved to: {args.output}")
+
+if __name__ == "__main__":
+    main()
--- a/latency/request.sh
+++ b/latency/request.sh
@ -0,0 +1,137 @@
+#!/bin/bash
+
+# Default API URL
+API_URL="http://stitcher.local:5000"
+OUTPUT_DIR=""
+ITERATION_RANGE=""
+SAVE_OUTPUT=true
+
+# Parse command line arguments
+while [[ "$#" -gt 0 ]]; do
+    case $1 in
+        -o|--output) OUTPUT_DIR="$2"; shift ;;
+        -u|--url) API_URL="$2"; shift ;;
+        -i|--iteration) ITERATION_RANGE="$2"; shift ;;
+        -n|--no-output) SAVE_OUTPUT=false ;;
+        *) echo "Unknown parameter passed: $1"; exit 1 ;;
+    esac
+    shift
+done
+
+# Check if output directory is specified
+if [ -z "$OUTPUT_DIR" ]; then
+    echo "Error: Output directory not specified. Use -o or --output to specify the directory."
+    exit 1
+fi
+
+# Create the output directory if it doesn't exist
+mkdir -p "$OUTPUT_DIR"
+
+LOG_FILE="${OUTPUT_DIR}/results.txt"
+PERFORMANCE_FILE="${OUTPUT_DIR}/performance.csv"
+
+# Add CSV header
+echo "Title,Latency(s),Payload" > "$PERFORMANCE_FILE"
+
+exec > >(tee -a "$LOG_FILE") 2>&1
+
+# Define the tests and their corresponding payloads
+titles=(
+    "01_L19-N21-Small_Square_Image_3x3_tiles"
+    "02_H27-K30-Small_Square_Image_4x4_tiles_0.75_scale"
+    "03_Q46-W48-Small_Rectangle_image_3x6_tiles"
+    "04_K22-N29-Small_Long_Rectangle_Image_8x4_tiles_0.5_scale"
+    "05_O30-P31-Small_Square_Cropped_to_LeftOneTile"
+    "06_X46-Y47-Small_Square_Cropped_to_MiddleEqually"
+    "07_T21-Z27-Medium_7x7_Square_Cropped_to_LeftTop4x3Tile"
+    "08_X14-AD20-Medium_7x7_Square_Cropped_to_MiddleEqually"
+    "09_A1-AE13-Entire_Left_Panel"
+    "10_A14-AE42-Entire_Middle_Panel"
+    "11_A1-AE55-Full_Image"
+)
+
+payloads=(
+    '{"canvas_rect":"L19:N21","crop_offset":[0,0],"crop_size":[1,1],"output_scale":1}'
+    '{"canvas_rect":"H27:K30","crop_offset":[0,0],"crop_size":[1,1],"output_scale":0.75}'
+    '{"canvas_rect":"Q46:W48","crop_offset":[0,0],"crop_size":[1,1],"output_scale":1}'
+    '{"canvas_rect":"K22:N29","crop_offset":[0,0],"crop_size":[1,1],"output_scale":0.5}'
+    '{"canvas_rect":"O30:P31","crop_offset":[0.075,0.625],"crop_size":[0.4,0.35],"output_scale":1}'
+    '{"canvas_rect":"X46:Y47","crop_offset":[0.25,0.25],"crop_size":[0.5,0.5],"output_scale":1}'
+    '{"canvas_rect":"T21:Z27","crop_offset":[0.0125,0.0125],"crop_size":[0.55,0.375],"output_scale":1}'
+    '{"canvas_rect":"X14:AD20","crop_offset":[0.25,0.25],"crop_size":[0.5,0.5],"output_scale":1}'
+    '{"canvas_rect":"A1:AE13","crop_offset":[0,0],"crop_size":[1,1],"output_scale":1}'
+    '{"canvas_rect":"A14:AE42","crop_offset":[0,0],"crop_size":[1,1],"output_scale":1}'
+    '{"canvas_rect":"A1:AE55","crop_offset":[0,0],"crop_size":[1,1],"output_scale":1}'
+)
+
+# Determine the loop range
+if [ -z "$ITERATION_RANGE" ]; then
+    start=0
+    end=$((${#titles[@]} - 1))
+elif [[ $ITERATION_RANGE == -* ]]; then
+    index=$((${ITERATION_RANGE#-} - 1));
+    if [ "$index" -lt 0 ] || [ "$index" -ge "${#titles[@]}" ]; then echo "Error: Invalid iteration number."; exit 1; fi
+    start=$index; end=$index
+elif [[ $ITERATION_RANGE == *-* ]]; then
+    IFS='-' read -r start_range end_range <<< "$ITERATION_RANGE";
+    start=$((start_range - 1)); end=$((end_range - 1));
+    if [ "$start" -lt 0 ] || [ "$end" -ge "${#titles[@]}" ] || [ "$start" -gt "$end" ]; then echo "Error: Invalid iteration range."; exit 1; fi
+else
+    index=$(($ITERATION_RANGE - 1));
+    if [ "$index" -lt 0 ] || [ "$index" -ge "${#titles[@]}" ]; then echo "Error: Invalid iteration number."; exit 1; fi
+    start=$index; end=$index
+fi
+
+# Loop through the tests and execute curl
+for i in $(seq $start $end); do
+    title="${titles[$i]}"
+    payload="${payloads[$i]}"
+    
+    echo "Running test: $title"
+
+    # Set the output target for curl. If --no-output is used, send to /dev/null
+    if [ "$SAVE_OUTPUT" = true ]; then
+        output_target="$OUTPUT_DIR/${title}.png"
+    else
+        output_target="/dev/null"
+    fi
+
+    time_taken=$(curl -o "$output_target" -w "%{time_total}\n" -X POST "${API_URL}/api/image/generate" -H "Content-Type: application/json" -d "$payload" -s | head -n 1)
+
+    if [ "$SAVE_OUTPUT" = true ]; then
+        echo "Image saved to $output_target"
+    else
+        echo "Request completed (output discarded)."
+    fi
+    
+    echo "Total time taken: ${time_taken}s"
+    echo "---------------------------------"
+
+    # Sanitize payload, somehow the python parser can't accept comma "," inside the payload
+    payload_sanitized="${payload//,/-}"
+
+    echo "\"$title\",$time_taken,\"$payload_sanitized\"" >> "$PERFORMANCE_FILE"
+done
+
+echo "All specified tests completed."
+
+
+# --- Graph Generation Section ---
+PYTHON_SCRIPT_NAME="generate_graph.py"
+
+if [ ! -f "$PYTHON_SCRIPT_NAME" ]; then
+    echo "Warning: Python script '$PYTHON_SCRIPT_NAME' not found. Skipping graph generation."
+    exit 0
+fi
+if ! command -v python3 &> /dev/null; then
+    echo "Warning: python3 is not installed. Skipping graph generation."
+    exit 0
+fi
+
+FOLDER_NAME=$(basename "$OUTPUT_DIR")
+
+GRAPH_OUTPUT_PATH="${OUTPUT_DIR}/latency-${FOLDER_NAME}.png"
+
+echo "---------------------------------"
+echo "Generating performance graph..."
+python3 "$PYTHON_SCRIPT_NAME" --input "$PERFORMANCE_FILE" --output "$GRAPH_OUTPUT_PATH" --user "$FOLDER_NAME"
--- a/throughput/jmeter.log
+++ b/throughput/jmeter.log
@ -0,0 +1,40 @@
+2025-11-17 17:31:17,310 INFO o.a.j.u.JMeterUtils: Setting Locale to en_EN
+2025-11-17 17:31:17,327 INFO o.a.j.JMeter: Loading user properties from: /opt/apache-jmeter-5.6.3/bin/user.properties
+2025-11-17 17:31:17,327 INFO o.a.j.JMeter: Loading system properties from: /opt/apache-jmeter-5.6.3/bin/system.properties
+2025-11-17 17:31:17,332 INFO o.a.j.JMeter: Copyright (c) 1998-2024 The Apache Software Foundation
+2025-11-17 17:31:17,332 INFO o.a.j.JMeter: Version 5.6.3
+2025-11-17 17:31:17,332 INFO o.a.j.JMeter: java.version=21.0.8
+2025-11-17 17:31:17,332 INFO o.a.j.JMeter: java.vm.name=OpenJDK 64-Bit Server VM
+2025-11-17 17:31:17,332 INFO o.a.j.JMeter: os.name=Linux
+2025-11-17 17:31:17,332 INFO o.a.j.JMeter: os.arch=amd64
+2025-11-17 17:31:17,332 INFO o.a.j.JMeter: os.version=6.14.0-35-generic
+2025-11-17 17:31:17,332 INFO o.a.j.JMeter: file.encoding=UTF-8
+2025-11-17 17:31:17,332 INFO o.a.j.JMeter: java.awt.headless=null
+2025-11-17 17:31:17,332 INFO o.a.j.JMeter: Max memory     =1073741824
+2025-11-17 17:31:17,332 INFO o.a.j.JMeter: Available Processors =8
+2025-11-17 17:31:17,340 INFO o.a.j.JMeter: Default Locale=English (EN)
+2025-11-17 17:31:17,341 INFO o.a.j.JMeter: JMeter  Locale=English (EN)
+2025-11-17 17:31:17,341 INFO o.a.j.JMeter: JMeterHome=/opt/apache-jmeter-5.6.3
+2025-11-17 17:31:17,341 INFO o.a.j.JMeter: user.dir  =/home/ibnufadhil/Documents/projects/benchmark/throughput
+2025-11-17 17:31:17,341 INFO o.a.j.JMeter: PWD       =/home/ibnufadhil/Documents/projects/benchmark/throughput
+2025-11-17 17:31:17,391 INFO o.a.j.JMeter: IP: 10.250.7.97 Name: SE-146 FullName: SE-146
+2025-11-17 17:31:17,398 INFO o.a.j.JMeter: Loaded icon properties from org/apache/jmeter/images/icon.properties
+2025-11-17 17:31:17,543 INFO o.a.j.JMeterGuiLauncher: Setting LAF to: com.github.weisj.darklaf.DarkLaf:com.github.weisj.darklaf.theme.DarculaTheme
+2025-11-17 17:31:25,059 INFO o.a.j.s.FileServer: Default base='/home/ibnufadhil/Documents/projects/benchmark/throughput'
+2025-11-17 17:31:25,061 INFO o.a.j.g.a.Load: Loading file: /home/ibnufadhil/Documents/projects/benchmark/throughput/stitcher-benchmark.jmx
+2025-11-17 17:31:25,061 INFO o.a.j.s.FileServer: Set new base='/home/ibnufadhil/Documents/projects/benchmark/throughput'
+2025-11-17 17:31:25,209 INFO o.a.j.s.SaveService: Testplan (JMX) version: 2.2. Testlog (JTL) version: 2.2
+2025-11-17 17:31:25,236 INFO o.a.j.s.SaveService: Using SaveService properties version 5.0
+2025-11-17 17:31:25,238 INFO o.a.j.s.SaveService: Using SaveService properties file encoding UTF-8
+2025-11-17 17:31:25,240 INFO o.a.j.s.SaveService: Loading file: /home/ibnufadhil/Documents/projects/benchmark/throughput/stitcher-benchmark.jmx
+2025-11-17 17:31:25,259 INFO o.a.j.p.h.s.HTTPSamplerBase: Parser for text/html is org.apache.jmeter.protocol.http.parser.LagartoBasedHtmlParser
+2025-11-17 17:31:25,259 INFO o.a.j.p.h.s.HTTPSamplerBase: Parser for application/xhtml+xml is org.apache.jmeter.protocol.http.parser.LagartoBasedHtmlParser
+2025-11-17 17:31:25,260 INFO o.a.j.p.h.s.HTTPSamplerBase: Parser for application/xml is org.apache.jmeter.protocol.http.parser.LagartoBasedHtmlParser
+2025-11-17 17:31:25,260 INFO o.a.j.p.h.s.HTTPSamplerBase: Parser for text/xml is org.apache.jmeter.protocol.http.parser.LagartoBasedHtmlParser
+2025-11-17 17:31:25,260 INFO o.a.j.p.h.s.HTTPSamplerBase: Parser for text/vnd.wap.wml is org.apache.jmeter.protocol.http.parser.RegexpHTMLParser
+2025-11-17 17:31:25,260 INFO o.a.j.p.h.s.HTTPSamplerBase: Parser for text/css is org.apache.jmeter.protocol.http.parser.CssParser
+2025-11-17 17:31:25,601 INFO o.a.j.s.SampleResult: Note: Sample TimeStamps are START times
+2025-11-17 17:31:25,601 INFO o.a.j.s.SampleResult: sampleresult.default.encoding is set to UTF-8
+2025-11-17 17:31:25,601 INFO o.a.j.s.SampleResult: sampleresult.useNanoTime=true
+2025-11-17 17:31:25,601 INFO o.a.j.s.SampleResult: sampleresult.nanoThreadSleep=5000
+2025-11-17 17:31:25,712 INFO o.a.j.s.FileServer: Set new base='/home/ibnufadhil/Documents/projects/benchmark/throughput'
--- a/throughput/request.sh
+++ b/throughput/request.sh
@ -0,0 +1,114 @@
+#!/bin/bash
+
+JMX_FILE="./stitcher-benchmark.jmx"
+JMETER_CMD="jmeter"
+DEFAULT_THREADS=10
+DEFAULT_LOOPS=10
+
+APP_NAME=""
+TARGET_URL=""
+THREADS=$DEFAULT_THREADS
+LOOPS=$DEFAULT_LOOPS
+
+show_help() {
+    echo "Usage: $0 -u <AppName> -H <TargetURL> [-t <Threads>] [-l <Loops>]"
+    echo ""
+    echo "Runs a JMeter benchmark test with specified parameters."
+    echo ""
+    echo "Required Flags:"
+    echo "  -o, --output    The name of the app or user for organizing results."
+    echo "  -H, --host      The target URL or IP address for the test (e.g., 10.250.22.29)."
+    echo ""
+    echo "Optional Flags:"
+    echo "  -t, --threads   Number of concurrent threads (users). Default: ${DEFAULT_THREADS}."
+    echo "  -l, --loops     Number of loops each thread will execute. Default: ${DEFAULT_LOOPS}."
+    echo "  -h, --help      Display this help message and exit."
+}
+
+while [[ $# -gt 0 ]]; do
+    key="$1"
+    case $key in
+        -o|--output)
+        APP_NAME="$2"
+        shift
+        shift
+        ;;
+        -H|--host)
+        TARGET_URL="$2"
+        shift
+        shift
+        ;;
+        -t|--threads)
+        THREADS="$2"
+        shift
+        shift
+        ;;
+        -l|--loops)
+        LOOPS="$2"
+        shift
+        shift
+        ;;
+        -h|--help)
+        show_help
+        exit 0
+        ;;
+        *)
+        echo "Unknown option: $1"
+        show_help
+        exit 1
+        ;;
+    esac
+done
+
+if [ -z "$APP_NAME" ] || [ -z "$TARGET_URL" ]; then
+    echo "ERROR: Missing required arguments."
+    echo ""
+    show_help
+    exit 1
+fi
+
+# --- Define Output Structure ---
+MAIN_OUTPUT_DIR="./${APP_NAME}"
+RESULT_CSV="${MAIN_OUTPUT_DIR}/${APP_NAME}_benchmark.csv"
+RESULT_DASHBOARD="${MAIN_OUTPUT_DIR}/${APP_NAME}_dashboard"
+JMETER_LOG_FILE="${MAIN_OUTPUT_DIR}/${APP_NAME}_jmeter.log"
+
+echo "--- Preparing for test run: '$APP_NAME' ---"
+mkdir -p "$MAIN_OUTPUT_DIR"
+echo "Output will be saved in: $MAIN_OUTPUT_DIR"
+
+echo "Cleaning up previous results..."
+rm -f "$RESULT_CSV"
+rm -rf "$RESULT_DASHBOARD"
+rm -f "$JMETER_LOG_FILE"
+echo "Cleanup complete."
+
+echo ""
+echo "--- Starting JMeter Benchmark ---"
+echo "  Target Host:  $TARGET_URL"
+echo "  Concurrency:  $THREADS threads"
+echo "  Iterations:   $LOOPS loops per thread"
+echo "  Total Requests: $((THREADS * LOOPS))"
+echo "---------------------------------"
+
+$JMETER_CMD -n \
+  -t "$JMX_FILE" \
+  -l "$RESULT_CSV" \
+  -e -o "$RESULT_DASHBOARD" \
+  -j "$JMETER_LOG_FILE" \
+  -Jthreads="$THREADS" \
+  -Jloops="$LOOPS" \
+  -Jurl="$TARGET_URL"
+
+if [ $? -eq 0 ]; then
+  echo ""
+  echo "--- Benchmark Finished Successfully ---"
+  echo "The HTML report is available here:"
+  echo "file://$PWD/${RESULT_DASHBOARD}/index.html"
+  echo "---------------------------------------"
+else
+  echo ""
+  echo "--- JMeter Finished with an Error ---"
+  echo "Check the log file for details: ${JMETER_LOG_FILE}"
+  echo "-------------------------------------"
+fi
--- a/throughput/stitcher-benchmark.jmx
+++ b/throughput/stitcher-benchmark.jmx
@ -0,0 +1,179 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<jmeterTestPlan version="1.2" properties="5.0" jmeter="5.6.3">
+  <hashTree>
+    <TestPlan guiclass="TestPlanGui" testclass="TestPlan" testname="stitcher-benchmark">
+      <elementProp name="TestPlan.user_defined_variables" elementType="Arguments" guiclass="ArgumentsPanel" testclass="Arguments" testname="User Defined Variables">
+        <collectionProp name="Arguments.arguments"/>
+      </elementProp>
+    </TestPlan>
+    <hashTree>
+      <ThreadGroup guiclass="ThreadGroupGui" testclass="ThreadGroup" testname="Thread Group">
+        <stringProp name="ThreadGroup.num_threads">${__P(threads, 10)}</stringProp>
+        <intProp name="ThreadGroup.ramp_time">1</intProp>
+        <boolProp name="ThreadGroup.same_user_on_next_iteration">true</boolProp>
+        <stringProp name="ThreadGroup.on_sample_error">continue</stringProp>
+        <elementProp name="ThreadGroup.main_controller" elementType="LoopController" guiclass="LoopControlPanel" testclass="LoopController" testname="Loop Controller">
+          <stringProp name="LoopController.loops">${__P(loops, 50)}</stringProp>
+          <boolProp name="LoopController.continue_forever">false</boolProp>
+        </elementProp>
+      </ThreadGroup>
+      <hashTree>
+        <HTTPSamplerProxy guiclass="HttpTestSampleGui" testclass="HTTPSamplerProxy" testname="HTTP Request">
+          <stringProp name="HTTPSampler.domain">${__P(url, stitchaton.local)}</stringProp>
+          <stringProp name="HTTPSampler.port">5000</stringProp>
+          <stringProp name="HTTPSampler.protocol">http</stringProp>
+          <stringProp name="HTTPSampler.path">/api/image/generate</stringProp>
+          <boolProp name="HTTPSampler.follow_redirects">true</boolProp>
+          <stringProp name="HTTPSampler.method">POST</stringProp>
+          <boolProp name="HTTPSampler.use_keepalive">true</boolProp>
+          <boolProp name="HTTPSampler.postBodyRaw">true</boolProp>
+          <elementProp name="HTTPsampler.Arguments" elementType="Arguments">
+            <collectionProp name="Arguments.arguments">
+              <elementProp name="" elementType="HTTPArgument">
+                <boolProp name="HTTPArgument.always_encode">false</boolProp>
+                <stringProp name="Argument.value">{&#xd;
+  &quot;canvas_rect&quot;: &quot;${canvasRect}&quot;,&#xd;
+  &quot;crop_offset&quot;: [0.25, 0.25],&#xd;
+  &quot;crop_size&quot;: [0.5, 0.5],&#xd;
+  &quot;output_scale&quot;: 0.5&#xd;
+}</stringProp>
+                <stringProp name="Argument.metadata">=</stringProp>
+              </elementProp>
+            </collectionProp>
+          </elementProp>
+        </HTTPSamplerProxy>
+        <hashTree>
+          <JSR223PreProcessor guiclass="TestBeanGUI" testclass="JSR223PreProcessor" testname="JSR223 PreProcessor">
+            <stringProp name="cacheKey">true</stringProp>
+            <stringProp name="filename"></stringProp>
+            <stringProp name="parameters"></stringProp>
+            <stringProp name="script">// Function to convert a numeric index (1-31) to the SBS Plate Row format (A-AE)
+String indexToRow(int num) {
+    if (num &lt;= 0) return &quot;&quot;;
+    if (num &lt;= 26) {
+        // A-Z is ASCII 65-90. &apos;A&apos; is char 65. So (num - 1) + 65.
+        return (char)(num + 64) as String;
+    } else {
+        // For AA-AE, the first char is &apos;A&apos;.
+        // 27 -&gt; AA, 28 -&gt; AB, etc.
+        // The second char is (num - 27) + 65 -&gt; &apos;A&apos;, &apos;B&apos;, etc.
+        return &quot;A&quot; + (char)(num - 26 + 64) as String;
+    }
+}
+
+// Define the maximum starting indices for a 2x2 grid
+// Max row is AE (31), so max starting row is AD (30)
+// Max col is 55, so max starting col is 54
+int maxStartRowIndex = 30;
+int maxStartCol = 54;
+
+// Generate random starting coordinates
+// nextInt(bound) generates 0 to bound-1, so add 1
+int randomRowStartIndex = new Random().nextInt(maxStartRowIndex) + 1;
+int randomColStart = new Random().nextInt(maxStartCol) + 1;
+
+// Calculate the end coordinates for the 2x2 grid
+String rowStart = indexToRow(randomRowStartIndex);
+String rowEnd = indexToRow(randomRowStartIndex + 1);
+int colEnd = randomColStart + 1;
+
+// Construct the final canvas_rect string
+String canvasRectValue = &quot;${rowStart}${randomColStart}:${rowEnd}${colEnd}&quot;;
+
+// Store the generated string in a JMeter variable named &quot;canvasRect&quot;
+// This makes it available to the HTTP Request sampler
+vars.put(&quot;canvasRect&quot;, canvasRectValue);
+
+// Optional: Log the generated value to see it in the JMeter log (for debugging)
+log.info(&quot;Generated canvas_rect: &quot; + canvasRectValue);</stringProp>
+            <stringProp name="scriptLanguage">groovy</stringProp>
+          </JSR223PreProcessor>
+          <hashTree/>
+          <HeaderManager guiclass="HeaderPanel" testclass="HeaderManager" testname="HTTP Header Manager">
+            <collectionProp name="HeaderManager.headers">
+              <elementProp name="" elementType="Header">
+                <stringProp name="Header.name">Content-Type</stringProp>
+                <stringProp name="Header.value">application/json</stringProp>
+              </elementProp>
+            </collectionProp>
+          </HeaderManager>
+          <hashTree/>
+        </hashTree>
+        <ResultCollector guiclass="SummaryReport" testclass="ResultCollector" testname="Summary Report">
+          <boolProp name="ResultCollector.error_logging">false</boolProp>
+          <objProp>
+            <name>saveConfig</name>
+            <value class="SampleSaveConfiguration">
+              <time>true</time>
+              <latency>true</latency>
+              <timestamp>true</timestamp>
+              <success>true</success>
+              <label>true</label>
+              <code>true</code>
+              <message>true</message>
+              <threadName>true</threadName>
+              <dataType>true</dataType>
+              <encoding>false</encoding>
+              <assertions>true</assertions>
+              <subresults>true</subresults>
+              <responseData>false</responseData>
+              <samplerData>false</samplerData>
+              <xml>false</xml>
+              <fieldNames>true</fieldNames>
+              <responseHeaders>false</responseHeaders>
+              <requestHeaders>false</requestHeaders>
+              <responseDataOnError>false</responseDataOnError>
+              <saveAssertionResultsFailureMessage>true</saveAssertionResultsFailureMessage>
+              <assertionsResultsToSave>0</assertionsResultsToSave>
+              <bytes>true</bytes>
+              <sentBytes>true</sentBytes>
+              <url>true</url>
+              <threadCounts>true</threadCounts>
+              <idleTime>true</idleTime>
+              <connectTime>true</connectTime>
+            </value>
+          </objProp>
+          <stringProp name="filename">/home/ibnufadhil/Documents/projects/benchmark/result.csv</stringProp>
+        </ResultCollector>
+        <hashTree/>
+        <ResultCollector guiclass="ViewResultsFullVisualizer" testclass="ResultCollector" testname="View Results Tree">
+          <boolProp name="ResultCollector.error_logging">false</boolProp>
+          <objProp>
+            <name>saveConfig</name>
+            <value class="SampleSaveConfiguration">
+              <time>true</time>
+              <latency>true</latency>
+              <timestamp>true</timestamp>
+              <success>true</success>
+              <label>true</label>
+              <code>true</code>
+              <message>true</message>
+              <threadName>true</threadName>
+              <dataType>true</dataType>
+              <encoding>false</encoding>
+              <assertions>true</assertions>
+              <subresults>true</subresults>
+              <responseData>false</responseData>
+              <samplerData>false</samplerData>
+              <xml>false</xml>
+              <fieldNames>true</fieldNames>
+              <responseHeaders>false</responseHeaders>
+              <requestHeaders>false</requestHeaders>
+              <responseDataOnError>false</responseDataOnError>
+              <saveAssertionResultsFailureMessage>true</saveAssertionResultsFailureMessage>
+              <assertionsResultsToSave>0</assertionsResultsToSave>
+              <bytes>true</bytes>
+              <sentBytes>true</sentBytes>
+              <url>true</url>
+              <threadCounts>true</threadCounts>
+              <idleTime>true</idleTime>
+              <connectTime>true</connectTime>
+            </value>
+          </objProp>
+          <stringProp name="filename"></stringProp>
+        </ResultCollector>
+        <hashTree/>
+      </hashTree>
+    </hashTree>
+  </hashTree>
+</jmeterTestPlan>