Страницы сайта долго грузятся

Вот список ботов, которых заблокировал хостер:

(360Spider|80legs.com|Abonti|Amazonbot|AcoonBot|Acunetix|adbeat_bot|AddThis.com|adidxbot|ADmantX|AhrefsBot|AngloINFO|Antelope|Applebot|BaiduSpider|BeetleBot|billigerbot|bingbot|binlar|bitlybot|BlackWidow|BLP_bbot|BoardReader|Bolt\ 0|BOT\ for\ JCE|Bot\ mailto\:craftbot@yahoo\.com|casper|CazoodleBot|CCBot|checkprivacy|ChinaClaw|chromeframe|ClaudeBot|Clerkbot|Cliqzbot|clshttp|CommonCrawler|comodo|CPython|crawler4j|Crawlera|CRAZYWEBCRAWLER|Curious|Custo|CWS_proxy|Default\ Browser\ 0|diavol|DigExt|Digincore|DIIbot|DISCo|discobot|DoCoMo|DotBot|Download\ Demon|DTS.Agent|EasouSpider|eCatch|ecxi|EirGrabber|Elmer|EmailCollector|EmailSiphon|EmailWolf|Exabot|ExaleadCloudView|ExpertSearch|ExpertSearchSpider|Express\ WebPictures|extract|ExtractorPro|EyeNetIE|Ezooms|F2S|FastSeek|feedfinder|FeedlyBot|FHscan|finbot|Flamingo_SearchEngine|FlappyBot|FlashGet|flicky|Flipboard|g00g1e|genieo|Genieo|GetRight|GetWeb\!|GigablastOpenSource|Go\-Ahead\-Got\-It|Go\!Zilla|GozaikBot|grab|GrabNet|Grafula|GrapeshotCrawler|GT\:\:WWW|GTB5|Guzzle|harvest|heritrix|HMView|HomePageBot|HTTP\:\:Lite|HTTrack|HubSpot|ia_archiver|icarus6|id\-search|IDBot|IlseBot|Image\ Stripper|Image\ Sucker|Indigonet|Indy\ Library|integromedb|InterGET|Internet\ Ninja|InternetSeer\.com|IRLbot|ISC\ Systems\ iRc\ Search\ 2\.1|jakarta|JetCar|JobdiggerSpider|JOC\ Web\ Spider|Jooblebot|Jorgee|kanagawa|KINGSpider|kmccrew|larbin|LeechFTP|libwww|Lingewoud|LinkChecker|linkdexbot|LinksCrawler|LinksManager\.com_bot|linkwalker|LinqiaRSSBot|LivelapBot|ltx71|LubbersBot|lwp\-trivial|Mass\ Downloader|masscan|maverick|Maxthon$|Mediatoolkitbot|megaindex|MegaIndex|MegaIndex|MFC_Tear_Sample|Microsoft\ URL\ Control|microsoft\.url|MIDown\ tool|miner|Missigua\ Locator|Mister\ PiX|mj12bot|Mozilla.*Indy|Mozilla.*NEWT|MSFrontPage|msnbot|Navroad|NearSite|Net\ Vampire|NetAnts|netEstate|NetSpider|NetZIP|NextGenSearchBot|nutch|Octopus|Offline\ Explorer|Offline\ Navigator|OpenindexSpider|OpenWebSpider|OrangeBot|Owlin|PageGrabber|PagesInventory|panopta|panscient\.com|Papa\ Foto|pavuk|pcBrowser|PECL\:\:HTTP|PeoplePal|Photon|PHPCrawl|planetwork|PleaseCrawl|PNAMAIN.EXE|PodcastPartyBot|prijsbest|proximic|psbot|purebot|pycurl|QuerySeekerSpider|R6_CommentReader|R6_FeedFetcher|RealDownload|ReGet|Riddler|Rippers\ 0|rogerbot|RSSingBot|rv\:1.9.1|RyzeCrawler|SafeSearch|SBIder|Scrapy|Scrapy|Screaming|search_robot|search.goo.ne.jp|serpstatbot|SearchmetricsBot|Semrush|SemrushBot|SentiBot|SEOkicks|SeznamBot|ShowyouBot|SightupBot|SISTRIX|sitecheck\.internetseer\.com|siteexplorer.info|SiteSnagger|skygrid|Slackbot|Slurp|SmartDownload|Snoopy|Sogou|Sosospider|spaumbot|Steeler|sucker|SuperBot|Superfeedr|SuperHTTP|SurdotlyBot|Surfbot|tAkeOut|Teleport\ Pro|TinEye|TinEye-bot|Toata\ dragostea\ mea\ pentru\ diavola|Toplistbot|trendictionbot|turnit|TurnitinBot|Twenga|TwengaBot|Twitterbot|URI\:\:Fetch|urllib|Vagabondo|Vagabondo|vikspider|VoidEYE|VoilaBot|WBSearchBot|Web\ Image\ Collector|Web\ Sucker|webalta|WebAuto|WebBandit|WebCollage|WebCopier|WebFetch|WebGo\ IS|WebLeacher|WebReaper|WebSauger|Website\ eXtractor|Website\ Quester|WebStripper|WebWhacker|WebZIP|Wells\ Search\ II|WEP\ Search|WeSEE|Widow|WinInet|woobot|woopingbot|worldwebheritage.org|Wotbox|WPScan|WWW\-Mechanize|WWWOFFLE|Xaldon\ WebSpider|XoviBot|yacybot|Yahoo|YisouSpider|zermelo|Zeus|zh-CN|ZmEu|ZumBot|ZyBorg)

Немного ли?

В таких случаях в первую очередь надо выяснять, на каком этапе возникают тормоза. Возможно, что в данном случае проблема долгой загрузки страниц вообще никак не связана с DNS.

просто любопытно, что после перехода на NS хостера, сайт стал медленнее грузится. 

Сайт не блещет скоростью, но в dns ли проблема это под вопросом.

какой домен проверяете?

автоексперт

У меня не автоексперт домен)

Так как не видя пациента можно что-то говорить? Гадать можно вечно)