From a57d7b51b1152c576ce260f10ff3f7c653e740ad Mon Sep 17 00:00:00 2001
From: Lovell Fuller <github@lovell.info>
Date: Sun, 14 Mar 2021 19:51:45 +0000
Subject: [PATCH] Tests: match concurrency with CPU count

---
 test/bench/perf.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/test/bench/perf.js b/test/bench/perf.js
index 9e665179..27fff04f 100644
--- a/test/bench/perf.js
+++ b/test/bench/perf.js
@@ -1,5 +1,6 @@
 'use strict';
 
+const os = require('os');
 const fs = require('fs');
 
 const async = require('async');
@@ -25,6 +26,9 @@ const height = 588;
 // Disable libvips cache to ensure tests are as fair as they can be
 sharp.cache(false);
 
+// Spawn one thread per CPU
+sharp.concurrency(os.cpus().length);
+
 async.series({
   jpeg: function (callback) {
     const inputJpgBuffer = fs.readFileSync(fixtures.inputJpg);