[TASK] Add performance test "npm run perf"

.gitignore

@@ -56,3 +56,6 @@ dist/
 
 # Ignore flow output directory
 out/
+
+# Ignore perf test cache
+scripts/cache

package.json

@@ -50,7 +50,8 @@
     "pretest": "node_modules/.bin/gulp concat-sjcl",
     "test": "./node_modules/.bin/istanbul test -x build/sjcl.js -x src/js/jsbn/* ./node_modules/mocha/bin/_mocha -- --reporter tap test/*-test.js",
     "coveralls": "cat ./coverage/lcov.info | ./node_modules/.bin/coveralls",
-    "lint": "./node_modules/.bin/gulp lint"
+    "lint": "./node_modules/.bin/gulp lint",
+    "perf": "./scripts/perf_test.sh"
   },
   "repository": {
     "type": "git",

scripts/perf_test.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+URL="https://www.dropbox.com/s/a0gy7vbb86eeqlq/ledger-full-1000000.json?dl=1"
+DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
+DEST="$DIR/cache/ledger-full-1000000.json"
+if [ ! -e "$DEST" ]
+then
+  echo "Downloading test data..."
+  mkdir -p "$DIR/cache"
+  curl -L "$URL" > "$DEST"
+fi
+time node "$DIR/verify_ledger_json.js" "$DEST"