code.ts

// Return from Lambda
return {
  status: "200",
  statusDescription: "OK",
  headers: {
    "content-type": [
      {
        key: "Content-Type",
        value: "text/html"
      }
    ]
  },
  body: require("fs").readFileSync(`./pages${request.uri}`, "utf8")
};

// Return from direct S3 call (not using origin)
const { S3Client } = await import("@aws-sdk/client-s3/S3Client");
const s3 = new S3Client({ region: request.origin?.s3?.region });
console.log("BucketName: " + bucketName);
console.log("S3origin path: " + s3Origin.path);
console.log("URI: " + request.uri);
const s3Params = {
  Bucket: bucketName,
  Key: `${s3Origin.path.replace("/", "")}${request.uri}` // This is the page e.g static-pages/ssg-page.html
};
const { GetObjectCommand } = await import(
  "@aws-sdk/client-s3/commands/GetObjectCommand"
);
const { Body } = await s3.send(new GetObjectCommand(s3Params));
const getStream = await import("get-stream");
const bodyString = await getStream.default(Body as Readable);
return {
  status: "200",
  statusDescription: "OK",
  headers: {
    "content-type": [
      {
        key: "Content-Type",
        value: "text/html"
      }
    ]
  },
  body: bodyString
};

perf-test.js

import http from "k6/http";
import { check, sleep } from "k6";
import { Rate } from "k6/metrics";

let failureRate = new Rate("check_failure_rate");

export let options = {
  stages: [
    // Linearly ramp up from 1 to 50 VUs during first minute
    { target: 50, duration: "1m" },
    // Hold at 50 VUs for the next 3 minutes and 30 seconds
    { target: 50, duration: "3m30s" },
    // // Linearly ramp down from 50 to 0 50 VUs over the last 30 seconds
    { target: 0, duration: "30s" }
    // Total execution time will be ~5 minutes
  ],
  thresholds: {
    // Check HTTP request duration is less than the following thresholds
    // Low thresholds since initial page is served by CloudFront cache
    http_req_duration: [],
    // Thresholds based on the custom metric we defined and use to track application failures
    check_failure_rate: [
      // Global failure rate should be less than 1%
      "rate<0.01",
      // Abort the test early if it climbs over 5%
      { threshold: "rate<=0.05", abortOnFail: true }
    ]
  }
};

const BASE_URL =
  __ENV.K6_BASE_URL || "https://d33grmfi56ge3u.cloudfront.net/ssg-page";

export function setup() {
}

export default function () {
  let response = http.get(BASE_URL);

  // check() returns false if any of the specified conditions fail
  let checkRes = check(response, {
    "status is 200": (r) => r.status === 200,
    "content is present": (r) => r.body !== {}
  });

  failureRate.add(!checkRes);

  sleep(Math.random() * 3 + 2); // Random sleep between 2s and 5s
}

serverless-next-js-perf-test.txt

current (s3 origin + origin request handler + origin response handler)


  execution: local
     output: -
     script: index-test.js

    duration: -,  iterations: -
         vus: 1, max: 50

    done [==========================================================] 5m0s / 5m0s

    ✓ status is 200
    ✓ content is present

  ✓ check_failure_rate.........: 0.00%   ✓ 0    ✗ 3381
    checks.....................: 100.00% ✓ 6764 ✗ 0   
    data_received..............: 9.1 MB  30 kB/s
    data_sent..................: 268 kB  892 B/s
    http_req_blocked...........: avg=706.16µs min=0s       med=0s       max=333.4ms  p(90)=1µs      p(95)=1µs     
    http_req_connecting........: avg=324.58µs min=0s       med=0s       max=193.56ms p(90)=0s       p(95)=0s      
    http_req_duration..........: avg=316.69ms min=110.24ms med=351.43ms max=1.76s    p(90)=433.84ms p(95)=564.84ms
    http_req_receiving.........: avg=338.28µs min=34µs     med=81µs     max=219.87ms p(90)=110µs    p(95)=124µs   
    http_req_sending...........: avg=57.91µs  min=22µs     med=56µs     max=286µs    p(90)=72µs     p(95)=83.94µs 
    http_req_tls_handshaking...: avg=358.88µs min=0s       med=0s       max=260.5ms  p(90)=0s       p(95)=0s      
    http_req_waiting...........: avg=316.3ms  min=110.02ms med=351.23ms max=1.76s    p(90)=433.44ms p(95)=559.67ms
    http_reqs..................: 3382    11.273326/s
    iteration_duration.........: avg=3.78s    min=719.9ms  med=3.77s    max=6.32s    p(90)=5s       p(95)=5.17s   
    iterations.................: 3341    11.136659/s
    vus........................: 1       min=1  max=50
    vus_max....................: 50      min=50 max=50


c1: remove origin response handler

  execution: local
     output: -
     script: index-test.js

    duration: -,  iterations: -
         vus: 1, max: 50

    done [==========================================================] 5m0s / 5m0s

    ✓ status is 200
    ✓ content is present

  ✓ check_failure_rate.........: 0.00%   ✓ 0    ✗ 3435
    checks.....................: 100.00% ✓ 6872 ✗ 0   
    data_received..............: 9.2 MB  31 kB/s
    data_sent..................: 271 kB  904 B/s
    http_req_blocked...........: avg=1.44ms   min=0s      med=0s       max=2.03s    p(90)=1µs      p(95)=1µs     
    http_req_connecting........: avg=799.37µs min=0s      med=0s       max=2.02s    p(90)=0s       p(95)=0s      
    http_req_duration..........: avg=276.88ms min=95.46ms med=331.17ms max=945.9ms  p(90)=386.99ms p(95)=409.45ms
    http_req_receiving.........: avg=128.82µs min=37µs    med=75µs     max=38.73ms  p(90)=115µs    p(95)=142.25µs
    http_req_sending...........: avg=63.91µs  min=21µs    med=54µs     max=12.79ms  p(90)=83µs     p(95)=109µs   
    http_req_tls_handshaking...: avg=343.62µs min=0s      med=0s       max=111.96ms p(90)=0s       p(95)=0s      
    http_req_waiting...........: avg=276.68ms min=91.2ms  med=330.94ms max=945.71ms p(90)=386.78ms p(95)=409.32ms
    http_reqs..................: 3436    11.453326/s
    iteration_duration.........: avg=3.73s    min=1.49s   med=3.71s    max=7.07s    p(90)=4.95s    p(95)=5.11s   
    iterations.................: 3389    11.296659/s
    vus........................: 1       min=1  max=50
    vus_max....................: 50      min=50 max=50
    
c2: remove origin response handler, s3 origin is just a dummy origin, origin request handler directly hits S3
 
  execution: local
     output: -
     script: index-test.js

    duration: -,  iterations: -
         vus: 1, max: 50

    done [==========================================================] 5m0s / 5m0s

    ✓ content is present
    ✗ status is 200
     ↳  99% — ✓ 3512 / ✗ 21

  ✓ check_failure_rate.........: 0.59%  ✓ 21   ✗ 3512
    checks.....................: 99.68% ✓ 7046 ✗ 22  
    data_received..............: 9.0 MB 30 kB/s
    data_sent..................: 278 kB 927 B/s
    http_req_blocked...........: avg=1.06ms   min=0s       med=0s       max=1.04s   p(90)=1µs      p(95)=1µs     
    http_req_connecting........: avg=706.7µs  min=0s       med=0s       max=1.03s   p(90)=0s       p(95)=0s      
    http_req_duration..........: avg=137.28ms min=27.44ms  med=121.03ms max=1.6s    p(90)=166.11ms p(95)=199.73ms
    http_req_receiving.........: avg=143.19µs min=35µs     med=77µs     max=89.06ms p(90)=106µs    p(95)=119µs   
    http_req_sending...........: avg=54.39µs  min=19µs     med=53µs     max=204µs   p(90)=70µs     p(95)=75µs    
    http_req_tls_handshaking...: avg=338.09µs min=0s       med=0s       max=267.3ms p(90)=0s       p(95)=0s      
    http_req_waiting...........: avg=137.09ms min=25.72ms  med=120.82ms max=1.6s    p(90)=165.85ms p(95)=199.25ms
    http_reqs..................: 3534   11.779992/s
    iteration_duration.........: avg=3.63s    min=412.72ms med=3.63s    max=6.19s   p(90)=4.8s     p(95)=4.99s   
    iterations.................: 3483   11.609992/s
    vus........................: 1      min=1  max=50
    vus_max....................: 50     min=50 max=50
    
c3: remove origin response handler, s3 origin is just a dummy origin, origin request handler serves pages from the Lambda package (at edge)

  execution: local
     output: -
     script: index-test.js

    duration: -,  iterations: -
         vus: 1, max: 50

    done [==========================================================] 5m0s / 5m0s

    ✓ status is 200
    ✓ content is present

  ✓ check_failure_rate.........: 0.00%   ✓ 0    ✗ 3631
    checks.....................: 100.00% ✓ 7264 ✗ 0   
    data_received..............: 9.3 MB  31 kB/s
    data_sent..................: 285 kB  949 B/s
    http_req_blocked...........: avg=834.65µs min=0s       med=0s      max=1.08s    p(90)=1µs     p(95)=1µs    
    http_req_connecting........: avg=534.69µs min=0s       med=0s      max=1.03s    p(90)=0s      p(95)=0s     
    http_req_duration..........: avg=48.88ms  min=24.26ms  med=35.98ms max=903.57ms p(90)=70.64ms p(95)=96.75ms
    http_req_receiving.........: avg=106.93µs min=34µs     med=72µs    max=19.48ms  p(90)=102µs   p(95)=118µs  
    http_req_sending...........: avg=54.14µs  min=20µs     med=51µs    max=1.63ms   p(90)=70µs    p(95)=78µs   
    http_req_tls_handshaking...: avg=292.05µs min=0s       med=0s      max=256.82ms p(90)=0s      p(95)=0s     
    http_req_waiting...........: avg=48.72ms  min=24.17ms  med=35.79ms max=903.48ms p(90)=70.53ms p(95)=96.63ms
    http_reqs..................: 3632    12.106659/s
    iteration_duration.........: avg=3.54s    min=347.88ms med=3.52s   max=5.72s    p(90)=4.76s   p(95)=4.91s  
    iterations.................: 3581    11.936659/s
    vus........................: 1       min=1  max=50
    vus_max....................: 50      min=50 max=50