benchmarking HashMaps

benchmarks/hashmap.spec.js

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+const HashMap = require('../src/data-structures/hash-maps/hash-map');
+const fs = require('fs');
+const readline = require('readline');
+const stream = require('stream');
+
+describe('HashMap Performance Test', () => {
+  describe('#set', () => {
+    it('set lots of values', (done) => {
+      hashMap = new HashMap();
+
+      const instream = fs.createReadStream('./words.txt');
+      const outstream = new stream;
+      const rl = readline.createInterface(instream, outstream);
+
+      rl.on('line', function(line) {
+        console.log(line);
+      });
+
+      rl.on('close', function() {
+        expect(hashMap.collisions).toBeLessThan(1);
+        done();
+      });
+
+    });
+  });
+});

benchmarks/words.txt

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+the
+of
+and
+to
+a
+in
+for
+is
+on
+that
+by
+this
+with
+i
+you
+it
+not
+or
+be
+are
+from
+at
+as
+your