Don't use heapTotal either

heapUsed is what really tells us if we have a leak.  heapTotal is more
indicative of how often gc runs.

Author: Forbes Lindesay

test/memory-leak.js

@@ -19,15 +19,14 @@ function next() {
       global.gc()
       sampleA = process.memoryUsage()
     }
-    if (i > 100000 * 5) {
+    if (i > 100000 * 10) {
       if (typeof global.gc === 'function') {
         global.gc()
         sampleB = process.memoryUsage()
         console.log('Memory usage at start:');
         console.dir(sampleA)
         console.log('Memory usage at end:');
         console.dir(sampleB)
-        assert(sampleA.heapTotal * 1.2 > sampleB.heapTotal, 'heapTotal should not grow by more than 20%')
         assert(sampleA.heapUsed * 1.2 > sampleB.heapUsed, 'heapUsed should not grow by more than 20%')
       }
     } else {