deps: switch to chromium's zlib implementation

benchmark/zlib/createInflate.js

@@ -0,0 +1,32 @@
+'use strict';
+const common = require('../common.js');
+const zlib = require('zlib');
+
+const bench = common.createBenchmark(main, {
+  inputLen: [16 * 1024 * 1024],
+  chunkLen: [1024],
+  n: [1e2]
+});
+
+function main({ n, inputLen, chunkLen }) {
+  const input = zlib.deflateSync(Buffer.alloc(inputLen, 'a'));
+
+  let i = 0;
+  bench.start();
+  (function next() {
+    let p = 0;
+    const inflater = zlib.createInflate();
+    inflater.resume();
+    inflater.on('finish', () => {
+      if (i++ === n)
+        return bench.end(n);
+      next();
+    });
+
+    (function nextChunk() {
+      if (p >= input.length)
+        return inflater.end();
+      inflater.write(input.slice(p, p += chunkLen), nextChunk);
+    })();
+  })();
+}

benchmark/zlib/inflate.js

@@ -0,0 +1,37 @@
+'use strict';
+const common = require('../common.js');
+const zlib = require('zlib');
+
+const bench = common.createBenchmark(main, {
+  method: ['inflate', 'inflateSync'],
+  inputLen: [1024],
+  n: [4e5]
+});
+
+function main({ n, method, inputLen }) {
+  const chunk = zlib.deflateSync(Buffer.alloc(inputLen, 'a'));
+
+  let i = 0;
+  switch (method) {
+    // Performs `n` single inflate operations
+    case 'inflate':
+      const inflate = zlib.inflate;
+      bench.start();
+      (function next(err, result) {
+        if (i++ === n)
+          return bench.end(n);
+        inflate(chunk, next);
+      })();
+      break;
+    // Performs `n` single inflateSync operations
+    case 'inflateSync':
+      const inflateSync = zlib.inflateSync;
+      bench.start();
+      for (; i < n; ++i)
+        inflateSync(chunk);
+      bench.end(n);
+      break;
+    default:
+      throw new Error('Unsupported inflate method');
+  }
+}

common.gypi

@@ -202,7 +202,10 @@
             'RuntimeLibrary': '<(MSVC_runtimeType)',
             'RuntimeTypeInfo': 'false',
           }
-        }
+        },
+        'xcode_settings': {
+          'GCC_OPTIMIZATION_LEVEL': '3', # stop gyp from defaulting to -Os
+        },
       }
     },