one crypto require should be enough

timse · timse · commit d45801a7f053 · 2017-01-10T00:55:44.000+11:00
diff --git a/lib/Compilation.js b/lib/Compilation.js
@@ -5,7 +5,7 @@
 "use strict";
 
 const async = require("async");
-
+const crypto = require("crypto");
 const Tapable = require("tapable");
 const EntryModuleNotFoundError = require("./EntryModuleNotFoundError");
 const ModuleNotFoundError = require("./ModuleNotFoundError");
@@ -949,7 +949,7 @@ class Compilation extends Tapable {
 		const hashFunction = outputOptions.hashFunction;
 		const hashDigest = outputOptions.hashDigest;
 		const hashDigestLength = outputOptions.hashDigestLength;
-		const hash = require("crypto").createHash(hashFunction);
+		const hash = crypto.createHash(hashFunction);
 		if(outputOptions.hashSalt)
 			hash.update(outputOptions.hashSalt);
 		this.mainTemplate.updateHash(hash);
@@ -969,7 +969,7 @@ class Compilation extends Tapable {
 		});
 		for(let i = 0; i < chunks.length; i++) {
 			chunk = chunks[i];
-			const chunkHash = require("crypto").createHash(hashFunction);
+			const chunkHash = crypto.createHash(hashFunction);
 			if(outputOptions.hashSalt)
 				hash.update(outputOptions.hashSalt);
 			chunk.updateHash(chunkHash);
@@ -992,7 +992,7 @@ class Compilation extends Tapable {
 		const hashFunction = outputOptions.hashFunction;
 		const hashDigest = outputOptions.hashDigest;
 		const hashDigestLength = outputOptions.hashDigestLength;
-		const hash = require("crypto").createHash(hashFunction);
+		const hash = crypto.createHash(hashFunction);
 		hash.update(this.fullHash);
 		hash.update(update);
 		this.fullHash = hash.digest(hashDigest);
