add hw2

node_modules/pino/benchmarks/utils/wrap-log-level.js

@@ -0,0 +1,55 @@
+'use strict'
+
+const { readFileSync } = require('fs')
+const vm = require('vm')
+const { join } = require('path')
+const code = readFileSync(
+  join(__dirname, '..', '..', 'node_modules', 'loglevel', 'lib', 'loglevel.js')
+)
+const { Console } = require('console')
+
+function build (dest) {
+  const sandbox = {
+    module: {},
+    console: new Console(dest, dest)
+  }
+  const context = vm.createContext(sandbox)
+
+  const script = new vm.Script(code)
+  script.runInContext(context)
+
+  const loglevel = sandbox.log
+
+  const originalFactory = loglevel.methodFactory
+  loglevel.methodFactory = function (methodName, logLevel, loggerName) {
+    const rawMethod = originalFactory(methodName, logLevel, loggerName)
+
+    return function () {
+      const time = new Date()
+      let array
+      if (typeof arguments[0] === 'string') {
+        arguments[0] = '[' + time.toISOString() + '] ' + arguments[0]
+        rawMethod.apply(null, arguments)
+      } else {
+        array = new Array(arguments.length + 1)
+        array[0] = '[' + time.toISOString() + ']'
+        for (var i = 0; i < arguments.length; i++) {
+          array[i + 1] = arguments[i]
+        }
+        rawMethod.apply(null, array)
+      }
+    }
+  }
+
+  loglevel.setLevel(loglevel.levels.INFO)
+  return loglevel
+}
+
+module.exports = build
+
+if (require.main === module) {
+  const loglevel = build(process.stdout)
+  loglevel.info('hello')
+  loglevel.info({ hello: 'world' })
+  loglevel.info('hello %j', { hello: 'world' })
+}