1元机场免费永久加速
推荐
9.1
75509512点评
立即下载
免费机场官网网址
推荐
9.1
75509512点评
立即下载
简单加速器ios下载
推荐
9.1
75509512点评
立即下载
安卓
苹果
排行
推荐
首页推荐
更多
一方加速器免费永久加速
下载
外网梯子加速器vnp
下载
小哈加速器最新版
下载
哈基米mac下载
下载
最新软件
更多
蘑菇加速器打不开
系统工具
5.47MB
下载
小蓝鸟加速器vn
系统工具
5.47MB
下载
upx加速器vp
系统工具
5.47MB
下载
acgpower加速器永久免费加速
系统工具
5.47MB
下载
Aleph7天试用
系统工具
5.47MB
下载
电龙加速器mac下载
系统工具
5.47MB
下载
草莓加速器vn
系统工具
5.47MB
下载
mac加速器vn
系统工具
5.47MB
下载
苹果精选
更多
turbo加速器破解版
Turbo加速器是一款网络加速工具,可以为用户提供更快的上网速度,让用户在网络世界里畅快冲浪。
下载
九州连npv
九州连,传说长达数千里的一条道路,历经千难万阻,却仍有无数人为之拼搏奋斗,不断向前。这条道路上汇聚了无数人的梦想和追求,他们不畏艰辛,努力前行,只为抵达终点的那一刻——九州之巅。
下载
娃娃加速器永久免费加速
娃娃加速器是一款可以让孩子玩得更快乐的创意玩具,它不仅加速了娃娃的运动速度,更是加速了孩子们快乐的心情。
下载
樱花宇宙vp
每到春天,粉色的樱花绽放在枝头,如梦如幻,仿若打破了时空界限飘洒在宇宙中。樱花如同宇宙中的恒星,闪耀着自己独特的美丽光芒。
下载
安卓精选
更多
Helium Network vqn
Learn about the innovative Helium Network and how it is revolutionizing the way IoT devices connect and communicate in a decentralized manner.
下载
海归加速器2024年
海归加速器是一种为海外归国人才提供支持和服务的平台,旨在帮助他们在国内创业就业,加速事业发展。
下载
水云免费永久加速
水云是一种常见的自然景观,水气凝结成云朵漂浮在天空中,给人一种清新、宁静的感觉。
下载
中信加速器vqn
中信加速器作为一家专注于支持初创企业的机构,致力于为创新项目提供资源、资金和导师支持,助力创业者实现梦想。
下载
友情链接
网站地图
QuickQ
旋风加速度器
旋风加速
坚果加速器
tiktok加速器
狗急加速器官网
免费vqn外网加速
小蓝鸟
优途加速器官网
风驰加速器
旋风加速器
免费vps加速器外网苹果版
旋风加速度器
快连加速器
快连加速器官网入口
原子加速器
快鸭加速器
快柠檬加速器
旋风加速度器
外网网址导航
软件中心
雷霆加速
狂飙加速器
哔咔漫画
小美
小美vpn
小美加速器
原子加速器app下载官网最新版
火箭加速器
盘古加速器
免费vqn外网
outline
旋风加速度器
快连加速器app
安易加速器下载官网最新版2024
猎豹加速器
快鸭加速器app
猴王加速器
猎豹nvp加速器
黑豹加速器
ios加速器
酷通加速器
纸飞机加速器
outline
极光加速器
v蚂蚁加速器
旋风加速度器
蚂蚁加速器
小猫咪ciash加速器
白鲸加速器官方
雷霆加器速
免费vqn加速试用
黑洞加速器下载官网免费
黑洞永久加速器
蚂蚁加速npv下载官网ios
旋风加速度器
加速器梯子推荐
银河加速器官网
黑洞加速
蓝鲸加速器
黑洞加速
outline
元链加速器
老王vp官网
海鸥加速度
雷霆vp加速器
雷霆加速器官网下载
旋风加速度器
免费vqn加速外网
雷霆加器速
小牛vp加速器
黑洞nvp加速器
外网加速免费软件
outline
快橙加速器
基本
文件
流程
错误
SQL
调试
请求信息 : 2024-11-21 05:22:44 HTTP/1.0 GET : http://api.nncms.cc/index.html
运行时间 : 0.073011s [ 吞吐率:13.70req/s ] 内存消耗:5,026.90kb 文件加载:162
查询信息 : 38 queries
缓存信息 : 19 reads,0 writes
/www/ipcms/public/index.php ( 0.79 KB )
/www/ipcms/vendor/autoload.php ( 0.75 KB )
/www/ipcms/vendor/composer/autoload_real.php ( 1.63 KB )
/www/ipcms/vendor/composer/platform_check.php ( 0.90 KB )
/www/ipcms/vendor/composer/ClassLoader.php ( 15.99 KB )
/www/ipcms/vendor/composer/autoload_static.php ( 8.62 KB )
/www/ipcms/vendor/symfony/polyfill-mbstring/bootstrap.php ( 7.21 KB )
/www/ipcms/vendor/symfony/polyfill-php80/bootstrap.php ( 1.54 KB )
/www/ipcms/vendor/topthink/think-helper/src/helper.php ( 7.62 KB )
/www/ipcms/vendor/symfony/deprecation-contracts/function.php ( 1.01 KB )
/www/ipcms/vendor/topthink/think-orm/stubs/load_stubs.php ( 0.17 KB )
/www/ipcms/vendor/topthink/framework/src/think/Exception.php ( 1.75 KB )
/www/ipcms/vendor/topthink/framework/src/think/Facade.php ( 2.80 KB )
/www/ipcms/vendor/symfony/translation/Resources/functions.php ( 0.57 KB )
/www/ipcms/vendor/ezyang/htmlpurifier/library/HTMLPurifier.composer.php ( 0.10 KB )
/www/ipcms/vendor/symfony/polyfill-php72/bootstrap.php ( 1.94 KB )
/www/ipcms/vendor/overtrue/pinyin/src/const.php ( 0.50 KB )
/www/ipcms/vendor/symfony/var-dumper/Resources/functions/dump.php ( 0.83 KB )
/www/ipcms/vendor/topthink/think-queue/src/common.php ( 1.04 KB )
/www/ipcms/vendor/topthink/framework/src/think/App.php ( 14.87 KB )
/www/ipcms/vendor/topthink/framework/src/think/Container.php ( 15.67 KB )
/www/ipcms/vendor/psr/container/src/ContainerInterface.php ( 1.05 KB )
/www/ipcms/app/provider.php ( 0.20 KB )
/www/ipcms/vendor/topthink/framework/src/think/Http.php ( 6.40 KB )
/www/ipcms/vendor/topthink/think-helper/src/helper/Str.php ( 7.51 KB )
/www/ipcms/vendor/topthink/framework/src/think/Env.php ( 4.83 KB )
/www/ipcms/app/common.php ( 3.48 KB )
/www/ipcms/vendor/topthink/framework/src/helper.php ( 19.02 KB )
/www/ipcms/vendor/topthink/framework/src/think/Config.php ( 5.23 KB )
/www/ipcms/config/aes.php ( 0.19 KB )
/www/ipcms/vendor/topthink/framework/src/think/facade/Env.php ( 1.72 KB )
/www/ipcms/config/app.php ( 1.05 KB )
/www/ipcms/config/article.php ( 0.18 KB )
/www/ipcms/config/cache.php ( 1.12 KB )
/www/ipcms/config/console.php ( 0.45 KB )
/www/ipcms/config/cookie.php ( 0.56 KB )
/www/ipcms/config/database.php ( 2.78 KB )
/www/ipcms/config/dede.php ( 0.39 KB )
/www/ipcms/config/error.php ( 0.47 KB )
/www/ipcms/config/filesystem.php ( 0.63 KB )
/www/ipcms/config/key.php ( 0.04 KB )
/www/ipcms/config/lang.php ( 0.81 KB )
/www/ipcms/config/log.php ( 1.41 KB )
/www/ipcms/config/middleware.php ( 0.19 KB )
/www/ipcms/config/mip.php ( 0.36 KB )
/www/ipcms/config/mq.php ( 0.26 KB )
/www/ipcms/config/openai.php ( 0.15 KB )
/www/ipcms/config/panel.php ( 0.31 KB )
/www/ipcms/config/queue.php ( 1.36 KB )
/www/ipcms/config/redis.php ( 0.35 KB )
/www/ipcms/config/route.php ( 1.54 KB )
/www/ipcms/config/session.php ( 0.57 KB )
/www/ipcms/config/trace.php ( 0.34 KB )
/www/ipcms/config/view.php ( 0.82 KB )
/www/ipcms/app/event.php ( 0.27 KB )
/www/ipcms/vendor/topthink/framework/src/think/Event.php ( 7.22 KB )
/www/ipcms/app/service.php ( 0.14 KB )
/www/ipcms/app/AppService.php ( 0.28 KB )
/www/ipcms/vendor/topthink/framework/src/think/Service.php ( 1.74 KB )
/www/ipcms/vendor/topthink/framework/src/think/Lang.php ( 9.75 KB )
/www/ipcms/vendor/topthink/framework/src/lang/zh-cn.php ( 13.02 KB )
/www/ipcms/vendor/topthink/framework/src/think/initializer/Error.php ( 3.31 KB )
/www/ipcms/vendor/topthink/framework/src/think/initializer/RegisterService.php ( 1.38 KB )
/www/ipcms/vendor/services.php ( 0.18 KB )
/www/ipcms/vendor/topthink/framework/src/think/service/PaginatorService.php ( 1.57 KB )
/www/ipcms/vendor/topthink/framework/src/think/service/ValidateService.php ( 1.02 KB )
/www/ipcms/vendor/topthink/framework/src/think/service/ModelService.php ( 1.81 KB )
/www/ipcms/vendor/topthink/think-queue/src/queue/Service.php ( 1.29 KB )
/www/ipcms/vendor/topthink/think-trace/src/Service.php ( 0.79 KB )
/www/ipcms/vendor/topthink/framework/src/think/Middleware.php ( 7.03 KB )
/www/ipcms/vendor/topthink/framework/src/think/initializer/BootService.php ( 0.80 KB )
/www/ipcms/vendor/topthink/think-orm/src/Paginator.php ( 12.10 KB )
/www/ipcms/vendor/topthink/framework/src/think/Validate.php ( 47.75 KB )
/www/ipcms/vendor/topthink/think-orm/src/Model.php ( 26.16 KB )
/www/ipcms/vendor/topthink/think-helper/src/contract/Arrayable.php ( 0.10 KB )
/www/ipcms/vendor/topthink/think-helper/src/contract/Jsonable.php ( 0.14 KB )
/www/ipcms/vendor/topthink/think-orm/src/model/concern/Attribute.php ( 18.08 KB )
/www/ipcms/vendor/topthink/think-orm/src/model/concern/RelationShip.php ( 26.88 KB )
/www/ipcms/vendor/topthink/think-orm/src/model/concern/ModelEvent.php ( 2.35 KB )
/www/ipcms/vendor/topthink/think-orm/src/model/concern/TimeStamp.php ( 5.92 KB )
/www/ipcms/vendor/topthink/think-orm/src/model/concern/Conversion.php ( 9.92 KB )
/www/ipcms/vendor/topthink/framework/src/think/Db.php ( 2.99 KB )
/www/ipcms/vendor/topthink/think-orm/src/DbManager.php ( 8.68 KB )
/www/ipcms/vendor/topthink/framework/src/think/Log.php ( 8.83 KB )
/www/ipcms/vendor/topthink/framework/src/think/Manager.php ( 4.16 KB )
/www/ipcms/vendor/psr/log/Psr/Log/LoggerInterface.php ( 3.16 KB )
/www/ipcms/vendor/topthink/framework/src/think/Cache.php ( 4.99 KB )
/www/ipcms/vendor/psr/simple-cache/src/CacheInterface.php ( 4.61 KB )
/www/ipcms/vendor/topthink/think-helper/src/helper/Arr.php ( 16.16 KB )
/www/ipcms/vendor/topthink/framework/src/think/cache/driver/Redis.php ( 6.97 KB )
/www/ipcms/vendor/topthink/framework/src/think/cache/Driver.php ( 8.35 KB )
/www/ipcms/vendor/topthink/framework/src/think/contract/CacheHandlerInterface.php ( 2.34 KB )
/www/ipcms/vendor/topthink/framework/src/think/Console.php ( 23.40 KB )
/www/ipcms/app/Request.php ( 0.09 KB )
/www/ipcms/vendor/topthink/framework/src/think/Request.php ( 56.07 KB )
/www/ipcms/app/middleware.php ( 0.44 KB )
/www/ipcms/vendor/topthink/framework/src/think/Pipeline.php ( 2.71 KB )
/www/ipcms/vendor/topthink/think-trace/src/TraceDebug.php ( 3.05 KB )
/www/ipcms/app/middleware/AllowCrossDomain.php ( 1.62 KB )
/www/ipcms/app/middleware/RealIp.php ( 0.52 KB )
/www/ipcms/app/middleware/LimitReportDomain.php ( 0.73 KB )
/www/ipcms/app/facade/Config.php ( 0.38 KB )
/www/ipcms/app/model/Config.php ( 0.52 KB )
/www/ipcms/app/model/BaseModel.php ( 0.17 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/connector/Mysql.php ( 4.55 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/PDOConnection.php ( 52.48 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/Connection.php ( 8.01 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/ConnectionInterface.php ( 4.75 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/builder/Mysql.php ( 14.63 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/Builder.php ( 40.79 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/Query.php ( 11.10 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/BaseQuery.php ( 36.24 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/concern/TimeFieldQuery.php ( 7.71 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/concern/AggregateQuery.php ( 2.93 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/concern/ModelRelationQuery.php ( 17.04 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/concern/ResultOperation.php ( 6.51 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/concern/Transaction.php ( 2.97 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/concern/WhereQuery.php ( 16.77 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/concern/JoinAndViewQuery.php ( 7.11 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/concern/ParamsBind.php ( 2.85 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/concern/TableFieldInfo.php ( 2.61 KB )
/www/ipcms/vendor/topthink/framework/src/think/log/driver/File.php ( 6.38 KB )
/www/ipcms/vendor/topthink/framework/src/think/contract/LogHandlerInterface.php ( 0.89 KB )
/www/ipcms/vendor/topthink/framework/src/think/log/Channel.php ( 6.82 KB )
/www/ipcms/vendor/topthink/framework/src/think/event/LogRecord.php ( 0.89 KB )
/www/ipcms/vendor/topthink/framework/src/think/facade/Cache.php ( 2.07 KB )
/www/ipcms/vendor/topthink/framework/src/think/Route.php ( 24.36 KB )
/www/ipcms/vendor/topthink/framework/src/think/route/RuleName.php ( 5.51 KB )
/www/ipcms/vendor/topthink/framework/src/think/route/Domain.php ( 5.59 KB )
/www/ipcms/vendor/topthink/framework/src/think/route/RuleGroup.php ( 14.42 KB )
/www/ipcms/vendor/topthink/framework/src/think/route/Rule.php ( 23.89 KB )
/www/ipcms/route/api.php ( 17.69 KB )
/www/ipcms/vendor/topthink/framework/src/think/facade/Route.php ( 4.85 KB )
/www/ipcms/vendor/topthink/framework/src/think/route/RuleItem.php ( 9.55 KB )
/www/ipcms/vendor/topthink/framework/src/think/route/Resource.php ( 6.80 KB )
/www/ipcms/route/download.php ( 0.71 KB )
/www/ipcms/vendor/topthink/framework/src/think/route/dispatch/Callback.php ( 0.96 KB )
/www/ipcms/vendor/topthink/framework/src/think/route/Dispatch.php ( 7.19 KB )
/www/ipcms/app/middleware/DownloadSite.php ( 0.60 KB )
/www/ipcms/app/model/Website.php ( 1.97 KB )
/www/ipcms/app/controller/download/IndexController.php ( 8.89 KB )
/www/ipcms/app/controller/download/BaseController.php ( 0.29 KB )
/www/ipcms/vendor/topthink/think-orm/src/model/relation/HasMany.php ( 12.16 KB )
/www/ipcms/vendor/topthink/think-orm/src/model/Relation.php ( 7.18 KB )
/www/ipcms/app/model/WebsiteFriendlink.php ( 0.25 KB )
/www/ipcms/vendor/topthink/think-orm/src/model/Collection.php ( 6.67 KB )
/www/ipcms/vendor/topthink/think-helper/src/Collection.php ( 16.74 KB )
/www/ipcms/app/model/DownloadArticle.php ( 0.72 KB )
/www/ipcms/app/model/SiteApp.php ( 1.22 KB )
/www/ipcms/vendor/topthink/think-orm/src/db/Raw.php ( 1.46 KB )
/www/ipcms/app/model/Article.php ( 0.25 KB )
/www/ipcms/vendor/topthink/think-orm/src/model/relation/BelongsTo.php ( 11.31 KB )
/www/ipcms/vendor/topthink/think-orm/src/model/relation/OneToOne.php ( 10.16 KB )
/www/ipcms/vendor/topthink/framework/src/think/Response.php ( 9.01 KB )
/www/ipcms/vendor/topthink/framework/src/think/response/View.php ( 3.41 KB )
/www/ipcms/vendor/topthink/framework/src/think/Cookie.php ( 6.51 KB )
/www/ipcms/vendor/topthink/framework/src/think/View.php ( 4.60 KB )
/www/ipcms/vendor/topthink/think-view/src/Think.php ( 8.67 KB )
/www/ipcms/vendor/topthink/think-template/src/Template.php ( 48.15 KB )
/www/ipcms/vendor/topthink/think-template/src/template/driver/File.php ( 2.42 KB )
/www/ipcms/runtime/temp/601ad6e6d34b072ef0d9a25794a0d16d.php ( 10.86 KB )
/www/ipcms/vendor/topthink/think-trace/src/Html.php ( 4.49 KB )
CONNECT:[ UseTime:0.000123s ] mysql:host=127.0.0.1;port=3306;dbname=ipcms;charset=utf8
SHOW FULL COLUMNS FROM `config` [ RunTime:0.000198s ]
SHOW FULL COLUMNS FROM `website` [ RunTime:0.000227s ]
SELECT * FROM `website` WHERE `type` = 'download' AND `id` = 10438 LIMIT 1 [ RunTime:0.000126s ]
SHOW FULL COLUMNS FROM `website_friendlink` [ RunTime:0.000159s ]
SELECT * FROM `website_friendlink` WHERE `website_id` = 10438 [ RunTime:0.000269s ]
SHOW FULL COLUMNS FROM `download_article` [ RunTime:0.000155s ]
SELECT * FROM `download_article` WHERE `website_id` = 10438 ORDER BY `id` DESC LIMIT 3 [ RunTime:0.000119s ]
SHOW FULL COLUMNS FROM `site_app` [ RunTime:0.000168s ]
SELECT * FROM `site_app` WHERE ( '1元机场免费永久加速' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000096s ]
SELECT * FROM `site_app` WHERE ( '免费机场官网网址' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000078s ]
SELECT * FROM `site_app` WHERE ( '简单加速器ios下载' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000080s ]
SELECT * FROM `download_article` WHERE `website_id` = 10438 ORDER BY `id` DESC LIMIT 3,4 [ RunTime:0.000096s ]
SELECT * FROM `site_app` WHERE ( '一方加速器免费永久加速' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000066s ]
SELECT * FROM `site_app` WHERE ( '外网梯子加速器vnp' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000047s ]
SELECT * FROM `site_app` WHERE ( '小哈加速器最新版' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000053s ]
SELECT * FROM `site_app` WHERE ( '哈基米mac下载' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000055s ]
SELECT * FROM `download_article` WHERE `website_id` = 10438 ORDER BY `id` DESC LIMIT 7,8 [ RunTime:0.000098s ]
SELECT * FROM `site_app` WHERE ( '蘑菇加速器打不开' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000068s ]
SELECT * FROM `site_app` WHERE ( '小蓝鸟加速器vn' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000051s ]
SELECT * FROM `site_app` WHERE ( 'upx加速器vp' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000054s ]
SELECT * FROM `site_app` WHERE ( 'acgpower加速器永久免费加速' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000055s ]
SELECT * FROM `site_app` WHERE ( 'Aleph7天试用' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000056s ]
SELECT * FROM `site_app` WHERE ( '电龙加速器mac下载' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000054s ]
SELECT * FROM `site_app` WHERE ( '草莓加速器vn' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000053s ]
SELECT * FROM `site_app` WHERE ( 'mac加速器vn' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000052s ]
SELECT * FROM `download_article` WHERE `website_id` = 10438 AND `type` = 1 AND `id` < 33321059 ORDER BY `id` DESC LIMIT 4 [ RunTime:0.023953s ]
SHOW FULL COLUMNS FROM `article` [ RunTime:0.000148s ]
SELECT `id`,`description` FROM `article` WHERE `id` IN (888649,1354090,1173171,808891) [ RunTime:0.000086s ]
SELECT * FROM `site_app` WHERE ( 'Helium Network vqn' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000073s ]
SELECT * FROM `site_app` WHERE ( '海归加速器2024年' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000064s ]
SELECT * FROM `site_app` WHERE ( '水云免费永久加速' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000060s ]
SELECT * FROM `site_app` WHERE ( '中信加速器vqn' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000062s ]
SELECT * FROM `download_article` WHERE `website_id` = 10438 AND `type` = 2 AND `id` < 33321059 ORDER BY `id` DESC LIMIT 4 [ RunTime:0.027904s ]
SELECT `id`,`description` FROM `article` WHERE `id` IN (529242,971064,945080,1307557) [ RunTime:0.000095s ]
SELECT * FROM `site_app` WHERE ( 'turbo加速器破解版' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000078s ]
SELECT * FROM `site_app` WHERE ( '九州连npv' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000071s ]
SELECT * FROM `site_app` WHERE ( '娃娃加速器永久免费加速' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000070s ]
SELECT * FROM `site_app` WHERE ( '樱花宇宙vp' like CONCAT('%', keyword, '%') ) LIMIT 1 [ RunTime:0.000070s ]
0.073452s