Merge pull request #17 from ktorio/bjhham/3.0.0

Improvements for allocation tests for 3.0.0

README.md

@@ -1 +1,17 @@
-# ktor-benchmarks
+# Ktor Benchmarks
+
+This repository contains benchmark tests for various performance metrics.
+
+### Allocation Benchmark (/allocation-benchmark)
+
+Tests how much memory is allocated on a given request.  This is done before every merge to ensure that the ktor server
+maintains a low memory profile by avoiding erroneous allocations.
+
+**Testing:** `ServerCallAllocationTest` runs through the supported engines and calculates the memory allocated per request.  When a new baseline is required,
+you may run the `dumpAllocations` gradle target.
+
+**Inspection:** the allocation baseline dump is a series of JSON files.  For easy reading of the values exported here, use the `reportServer` gradle target
+which has two pages for inspecting where memory is being allocated.  `previewClasses.html` shows the largest memory consumers for types allocated, and
+`previewSites.html` shows the code sites that allocate the most memory.
+
+**TeamCity:** [https://ktor.teamcity.com/buildConfiguration/Ktor_AllocationTests](https://ktor.teamcity.com/buildConfiguration/Ktor_AllocationTests)

allocation-benchmark/allocations/common.js

@@ -0,0 +1,53 @@
+
+const formatSize = (size) => Math.round(size / 1024 / 1024 * 1000) / 1000 + "Mb"
+
+export function displaySite(sites, item) {
+    const site = sites.append("div")
+        .attr("class", "site")
+        .attr("data-expand", "false")
+
+    const stackTrace = item.stackTrace.split(", ")
+
+    const siteElem = site.append("div")
+        .attr("class", "header")
+    siteElem.append("div").attr("class", "chevron")
+    siteElem.append("span")
+        .style("font-weight", "bold")
+        .text(`${formatSize(item.totalSize)} (${item.totalCount})`)
+    siteElem.append("span")
+        .text(stackTrace[1].split(" ")[0])
+    siteElem.on("click", () => {
+        site.attr("data-expand", site.attr("data-expand") === "false")
+    })
+
+    const stack = site.append("ul")
+        .attr("class", "stacktrace")
+        .style("list-style-type", "none")
+
+    stackTrace.forEach((stackItem) => {
+        const li = stack.append("li")
+        const [file, fun] = stackItem.split(" ")
+        li.append("span").attr("class", "file").text(file)
+        li.append("span").attr("class", "fun").text(fun)
+    })
+}
+
+export function setupRenderControls(drawAllocations) {
+    const render = () => {
+        const engineName = document.querySelector("input[name='engine']:checked").value
+        const snapshotDir = document.querySelector("input[name='snapshot']:checked").value
+        const reportPath = `${snapshotDir}/testMemoryConsumptionIsSame[${engineName}].json`;
+        d3.json(reportPath).then(result => {
+            drawAllocations(result.data)
+            document.getElementById("info").innerText = ""
+        }, () => {
+            drawAllocations({})
+            document.getElementById("info").innerText = `Nothing found for ${reportPath}`
+        })
+    }
+    document.querySelectorAll("input[type='radio']").forEach(elem => {
+        elem.onchange = render
+    })
+
+    render()
+}