isArray to native Array.isArray

isUnd(*) to native undefined === *
isFunc to native typeof * === 'function'
isObject to native typeof * === 'object'
microtime() to native Date().getTime();
noop to native ()=>{}
noopFalse to native ()=>false
noopTrue to native ()=>true
boolToAjax to native *?'1':'0'
Underscore.js to native

dev/Stores/User/Folder.js

@@ -4,7 +4,7 @@ import { settingsGet } from 'Storage/Settings';
 
 import { FolderType } from 'Common/Enums';
 import { UNUSED_OPTION_VALUE } from 'Common/Consts';
-import { isArray, folderListOptionsBuilder } from 'Common/Utils';
+import { folderListOptionsBuilder } from 'Common/Utils';
 import { getFolderInboxName, getFolderFromCacheList } from 'Common/Cache';
 
 import { momentNowUnix } from 'Common/Momentor';
@@ -72,7 +72,7 @@ class FolderUserStore {
 				trashFolder = this.trashFolder(),
 				archiveFolder = this.archiveFolder();
 
-			if (isArray(folders) && folders.length) {
+			if (Array.isArray(folders) && folders.length) {
 				if (sentFolder && UNUSED_OPTION_VALUE !== sentFolder) {
 					list.push(sentFolder);
 				}

dev/Stores/User/Message.js

@@ -1,5 +1,4 @@
 import window from 'window';
-import _ from '_';
 import ko from 'ko';
 import $ from '$';
 
@@ -8,7 +7,6 @@ import { Magics, Layout, Focused, MessageSetAction, StorageResultType, Notificat
 import {
 	trim,
 	isNormal,
-	isArray,
 	pInt,
 	pString,
 	plainToHtml,
@@ -102,7 +100,16 @@ class MessageUserStore {
 
 		this.onMessageResponse = this.onMessageResponse.bind(this);
 
-		this.purgeMessageBodyCacheThrottle = _.throttle(this.purgeMessageBodyCache, Magics.Time30s);
+		// throttle
+		var t, o = this;
+		this.purgeMessageBodyCacheThrottle = ()=>{
+			if (!t) {
+				t = setTimeout(()=>{
+					o.purgeMessageBodyCache();
+					t = 0;
+				}, Magics.Time30s);
+			}
+		};
 	}
 
 	computers() {
@@ -184,14 +191,17 @@ class MessageUserStore {
 			this.messageListCompleteLoadingThrottleForAnimation(value);
 		});
 
+		var d;
 		this.messageList.subscribe(
-			_.debounce((list) => {
-				list.forEach(item => {
+			(list)=>{
+				// debounce
+				d && clearTimeout(d);
+				d = setTimeout(()=>list.forEach(item => {
 					if (item && item.newForAnimation()) {
 						item.newForAnimation(false);
 					}
-				});
-			}, Magics.Time500ms)
+				}), Magics.Time500ms);
+			}
 		);
 
 		this.message.subscribe((message) => {
@@ -249,7 +259,7 @@ class MessageUserStore {
 
 	initUidNextAndNewMessages(folder, uidNext, newMessages) {
 		if (getFolderInboxName() === folder && isNormal(uidNext) && uidNext) {
-			if (isArray(newMessages) && newMessages.length) {
+			if (Array.isArray(newMessages) && newMessages.length) {
 				newMessages.forEach(item => {
 					addNewMessageCache(folder, item.Uid);
 				});
@@ -717,7 +727,7 @@ class MessageUserStore {
 			data.Result &&
 			'Collection/MessageCollection' === data.Result['@Object'] &&
 			data.Result['@Collection'] &&
-			isArray(data.Result['@Collection'])
+			Array.isArray(data.Result['@Collection'])
 		) {
 			let newCount = 0,
 				unreadCountChange = false;

dev/Stores/User/Pgp.js

@@ -1,9 +1,8 @@
 import ko from 'ko';
-import _ from '_';
 import $ from '$';
 
 import { i18n } from 'Common/Translator';
-import { log, isArray, isNonEmptyArray, pString, isUnd, trim } from 'Common/Utils';
+import { log, isNonEmptyArray, pString, trim } from 'Common/Utils';
 
 import AccountStore from 'Stores/User/Account';
 
@@ -56,7 +55,7 @@ class PgpUserStore {
 	}
 
 	findPrivateKeysByEncryptionKeyIds(encryptionKeyIds, recipients, returnWrapKeys) {
-		let result = isArray(encryptionKeyIds)
+		let result = Array.isArray(encryptionKeyIds)
 			? encryptionKeyIds.map(id => {
 					const key = id && id.toHex ? this.findPrivateKeyByHex(id.toHex()) : null;
 					return key ? (returnWrapKeys ? [key] : key.getNativeKeys()) : [null];
@@ -191,7 +190,7 @@ class PgpUserStore {
 				if (publicKeys && publicKeys.length) {
 					try {
 						const result = message.verify(publicKeys),
-							valid = (_.isArray(result) ? result : []).find(item => item && item.valid && item.keyid);
+							valid = (Array.isArray(result) ? result : []).find(item => item && item.valid && item.keyid);
 
 						if (valid && valid.keyid && valid.keyid && valid.keyid.toHex) {
 							fCallback(this.findPublicKeyByHex(valid.keyid.toHex()));
@@ -232,7 +231,7 @@ class PgpUserStore {
 				.attr('title', title);
 		}
 
-		if (!isUnd(text)) {
+		if (undefined !== text) {
 			dom.text(trim(text));
 		}
 	}