Initial setup of `colony-wallet` performance testing

wallet-performance-testing.patch

diff --git a/.babelrc b/.babelrc
index eb8457f..516cf7e 100644
--- a/.babelrc
+++ b/.babelrc
@@ -10,7 +10,8 @@
   ],
   "ignore": [
     "__tests__",
-    "__mocks__"
+    "__mocks__",
+    "__performance__"
   ],
   "env": {
     "es": {
diff --git a/.eslintignore b/.eslintignore
index e1010ae..1c78b01 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -2,4 +2,5 @@ node_modules
 scripts
 flow-typed
 jest.config.js
+jest-perf.config.js
 webpack.config.js
diff --git a/.flowconfig b/.flowconfig
index 09db309..2585d9c 100644
--- a/.flowconfig
+++ b/.flowconfig
@@ -4,6 +4,7 @@
 [ignore]
 .*/__tests__/.*
 .*/__mocks__/.*
+.*/__performance__/.*
 .*/lib/.*
 
 [libs]
diff --git a/jest-perf.config.js b/jest-perf.config.js
new file mode 100644
index 0000000..e087fe3
--- /dev/null
+++ b/jest-perf.config.js
@@ -0,0 +1,6 @@
+module.exports = {
+  rootDir: 'src',
+  testMatch: [
+    '**/__performance__/**/*.test.js?(x)',
+  ],
+};
diff --git a/jest.config.js b/jest.config.js
index aa0b358..4a1ea8d 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -12,4 +12,8 @@ module.exports = {
     'qrcode': '<rootDir>/src/__mocks__/qrcode.js',
     'ethereum-blockies': '<rootDir>/src/__mocks__/ethereum-blockies.js',
   },
+  testPathIgnorePatterns: [
+    '/node_modules/',
+    '/__performance__/',
+  ],
 };
diff --git a/package.json b/package.json
index 4acd2f7..e07adb3 100644
--- a/package.json
+++ b/package.json
@@ -27,6 +27,7 @@
     "test:watch": "NODE_ENV=test jest --watchAll",
     "test:coverage": "NODE_ENV=test jest --coverage",
     "test:ci": "jest --clearCache && NODE_ENV=test jest --ci --coverage --verbose=true --testResultsProcessor='jest-junit'",
+    "test:perf": "jest --clearCache && NODE_ENV=test jest --config jest-perf.config.js",
     "lockfile:update": "greenkeeper-lockfile-update",
     "lockfile:upload": "greenkeeper-lockfile-upload"
   },
diff --git a/scripts/jobs.js b/scripts/jobs.js
index 82315f8..0dd61bb 100644
--- a/scripts/jobs.js
+++ b/scripts/jobs.js
@@ -32,7 +32,14 @@ const cjsModules = message => run(
 );
 
 const flowTypes = message => run(
-  `flow-copy-source --ignore "${paths.globs.tests}" --ignore "${paths.globs.mocks}" --ignore "${paths.files.defaults}" --ignore "${paths.files.messages}" ${paths.source} ${paths.modules}`,
+  'flow-copy-source ' +
+  `--ignore "${paths.globs.tests}" ` +
+  `--ignore "${paths.globs.mocks}" ` +
+  `--ignore "${paths.globs.performance}" ` +
+  `--ignore "${paths.files.defaults}" ` +
+  `--ignore "${paths.files.messages}" ` +
+  `${paths.source} ` +
+  `${paths.modules}`,
   {},
   message
 );
diff --git a/scripts/paths.js b/scripts/paths.js
index 253e3d7..670b8ba 100644
--- a/scripts/paths.js
+++ b/scripts/paths.js
@@ -26,6 +26,7 @@ const files = {
 const globs = {
   tests: "**/__tests__/**",
   mocks: "**/__mocks__/**",
+  performance: "**/__performance__/**",
 };
 
 
diff --git a/scripts/watch.js b/scripts/watch.js
index bc5a64c..e804d2e 100644
--- a/scripts/watch.js
+++ b/scripts/watch.js
@@ -16,7 +16,11 @@ const files = {};
  * Initialize watcher
  */
 const sourceWatch = chokidar.watch(paths.source, {
-  ignored: ['**/__tests__', '**/__mocks__'],
+  ignored: [
+    paths.globs.tests,
+    paths.globs.mocks,
+    paths.globs.performance,
+  ],
   awaitWriteFinish: true
 });
 
diff --git a/src/__performance__/.eslintrc b/src/__performance__/.eslintrc
new file mode 100644
index 0000000..7d09b83
--- /dev/null
+++ b/src/__performance__/.eslintrc
@@ -0,0 +1,8 @@
+{
+  "env": {
+    "jest": true,
+  },
+  "rules": {
+    "flowtype/require-valid-file-annotation": [0],
+  },
+}
diff --git a/src/__performance__/performanceUtils.js b/src/__performance__/performanceUtils.js
new file mode 100644
index 0000000..bf0cbb2
--- /dev/null
+++ b/src/__performance__/performanceUtils.js
@@ -0,0 +1,16 @@
+export const performanceRunner = (runs = 10, callback) => {
+  let timeStart = 0;
+  const timeAccumulator = [];
+  for (let i = 0; i < runs; i += 1) {
+    timeStart = Date.now();
+    callback();
+    timeAccumulator.push(Date.now() - timeStart);
+  }
+  return timeAccumulator;
+};
+
+const perfomanceUtils = {
+  performanceRunner,
+};
+
+export default perfomanceUtils;
diff --git a/src/__performance__/wallet/create.test.js b/src/__performance__/wallet/create.test.js
new file mode 100644
index 0000000..28f1ed6
--- /dev/null
+++ b/src/__performance__/wallet/create.test.js
@@ -0,0 +1,21 @@
+import { performanceRunner } from '../performanceUtils';
+import { create } from '../../softwareWallet';
+
+jest.unmock('ethers/wallet');
+
+describe('Wallet Preformance', () => {
+  test('Wallet creation duration', () => {
+    const runs = 10;
+    /*
+     * This is super HIGH just because the Jest runner is slow.
+     * In a browser environment this would be at ~100 ms
+     */
+    const threshold = 700;
+    const times = performanceRunner(runs, create);
+    const totalTimes = times.reduce(
+      (totalTime, currentTime) => totalTime + currentTime,
+      0,
+    );
+    expect(totalTimes / runs).toBeLessThan(threshold);
+  });
+});