Add benchmark for copy-from

package-lock.json

@@ -16,6 +16,16 @@
       "integrity": "sha1-Ak8Pcq+iW3X5wO5zzU9V7Bvtl4Q=",
       "dev": true
     },
+    "benchmark": {
+      "version": "2.1.4",
+      "resolved": "https://registry.npmjs.org/benchmark/-/benchmark-2.1.4.tgz",
+      "integrity": "sha1-CfPeMckWQl1JjMLuVloOvzwqVik=",
+      "dev": true,
+      "requires": {
+        "lodash": "^4.17.4",
+        "platform": "^1.3.3"
+      }
+    },
     "bops": {
       "version": "0.0.6",
       "resolved": "https://registry.npmjs.org/bops/-/bops-0.0.6.tgz",
@@ -41,6 +51,12 @@
         "bops": "0.0.6"
       }
     },
+    "duplex-child-process": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/duplex-child-process/-/duplex-child-process-1.0.0.tgz",
+      "integrity": "sha1-SpSXQob7x4QNCFPSs/5ZCp20YUc=",
+      "dev": true
+    },
     "gonna": {
       "version": "0.0.0",
       "resolved": "https://registry.npmjs.org/gonna/-/gonna-0.0.0.tgz",
@@ -129,6 +145,12 @@
         "split": "^1.0.0"
       }
     },
+    "platform": {
+      "version": "1.3.5",
+      "resolved": "https://registry.npmjs.org/platform/-/platform-1.3.5.tgz",
+      "integrity": "sha512-TuvHS8AOIZNAlE77WUDiR4rySV/VMptyMfcfeoMgs4P8apaZM3JrnbzBiixKUv+XR6i+BXrQh8WAnjaSPFO65Q==",
+      "dev": true
+    },
     "postgres-array": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/postgres-array/-/postgres-array-2.0.0.tgz",