bench: Call gc before loop

.github/workflows/Test.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Run
         run: |
           export TZ="Europe/Tallinn"
-          c8 node --allow-natives-syntax -r ./test.js test/index.js --brief
+          c8 node --allow-natives-syntax --expose-gc -r ./test.js test/index.js --brief
       - name: Coveralls
         uses: coverallsapp/github-action@master
         with:

bench.js

@@ -55,6 +55,8 @@ function measure(fn, time, next) {
 	var i, hr
 	, count = 0
 	, ms = 0
+	/* c8 ignore next */
+	if (global.gc) global.gc()
 	for (; ms < time; ) {
 		count++
 		hr = process.hrtime()

snapshot.js

@@ -34,6 +34,7 @@ describe.assert.matchSnapshot = function(file, transform) {
 				input: actual,
 				encoding: "utf8"
 			})
+		/* c8 ignore next */
 		} catch(e) {
 			return this(0, e.stdout ?
 				"Snapshot " + file + "\n---\n" + e.stdout :