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December 10, 2018 19:33
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A simple script to measure API Gateway endpoint latency. Requires Apache HttpComponents
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| public void testPerf() throws IOException { | |
| // final HttpGet request = new HttpGet("http://petstore-demo-endpoint.execute-api.com/petstore/pets"); | |
| // final HttpGet request = new HttpGet("http://11ro68yamg.execute-api.us-east-1.amazonaws.com/petstore/pets"); //cf->petstore | |
| final HttpGet request = new HttpGet("https://11ro68yamg.execute-api.us-east-1.amazonaws.com/prod"); | |
| final int numRequests = 10000; | |
| long totalLatency = 0; | |
| final int[] histogram = new int[100]; | |
| final List<Integer> latencies = new ArrayList<>(); | |
| for (int i = 0; i < numRequests; i++) { | |
| final CloseableHttpClient client = HttpClients.createDefault(); | |
| final Stopwatch sw = Stopwatch.createStarted(); | |
| final CloseableHttpResponse resp = client.execute(request); | |
| sw.stop(); | |
| long millis = sw.elapsed(TimeUnit.MILLISECONDS); | |
| totalLatency += millis; | |
| if (millis > 600) { | |
| LOG.warn(String.format("Request took %dms" + ", request ID: %s", millis, resp.getFirstHeader("X-Amzn-Requestid"))); | |
| } | |
| histogram[((int) (millis / 100))]++; | |
| latencies.add((int) millis); | |
| } | |
| Collections.sort(latencies); | |
| final Integer p50 = latencies.get((50 * (numRequests) / 100) - 1); | |
| final Integer p90 = latencies.get((90 * (numRequests) / 100) - 1); | |
| final Integer p99 = latencies.get((99 * (numRequests) / 100) - 1); | |
| final Integer p100 = latencies.get((100 * (numRequests) / 100) - 1); | |
| LOG.info(String.format("Num requests: %d Avg latency: %fms", numRequests, totalLatency / (double) numRequests)); | |
| LOG.info(String.format("P50: %dms P90: %dms P99: %dms P100: %dms", p50, p90, p99, p100)); | |
| LOG.info(String.format("Distribution: ")); | |
| for (int i = 0; i < histogram.length; i++) { | |
| LOG.info(i*100 + "ms - " + (i+1)*100 + "ms: " + histogram[i]); | |
| } | |
| } |
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