{"id":15841,"date":"2020-04-04T13:07:04","date_gmt":"2020-04-04T06:07:04","guid":{"rendered":"https:\/\/kiencang.net\/?p=15841"},"modified":"2020-04-04T13:07:04","modified_gmt":"2020-04-04T06:07:04","slug":"tom-tat-tai-nguyen","status":"publish","type":"post","link":"https:\/\/kiencang.net\/tom-tat-tai-nguyen\/","title":{"rendered":"Gi\u1eef s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u th\u1ea5p v\u00e0 k\u00edch c\u1ee1 t\u1ea3i v\u1ec1 nh\u1ecf"},"content":{"rendered":"\n<p><a href=\"https:\/\/developers.google.com\/web\/tools\/lighthouse\/\" target=\"_blank\" rel=\"noreferrer noopener\">Lighthouse<\/a> l\u1eadp b\u00e1o c\u00e1o cung c\u1ea5p th\u00f4ng tin c\u00f3 bao nhi\u00eau y\u00eau c\u1ea7u m\u1ea1ng (network requests) \u0111\u01b0\u1ee3c t\u1ea1o ra v\u00e0 bao nhi\u00eau d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u chuy\u1ec3n (data was transferred) trong khi trang c\u1ee7a b\u1ea1n t\u1ea3i v\u1ec1:<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2020\/04\/tom-tat-tai-nguyen.png\" alt=\"t\u00f3m t\u1eaft t\u00e0i nguy\u00ean\" class=\"wp-image-15842\"\/><\/figure><\/div>\n\n\n<ul><li>S\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u (<strong>Request<\/strong>) v\u00e0 K\u00edch c\u1ee1 l\u01b0u chuy\u1ec3n (<strong>Transfer Size<\/strong>) cho h\u00e0ng Total (t\u1ed5ng s\u1ed1) \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n b\u1eb1ng c\u00e1ch c\u1ed9ng gi\u00e1 tr\u1ecb c\u1ee7a c\u00e1c h\u00e0ng \u1ea2nh (<strong>Image<\/strong>), JavaScript (<strong>Script<\/strong>), <strong>Font<\/strong> (ch\u1eef), <strong>Stylesheet<\/strong> (CSS), C\u00e1c c\u00e1i kh\u00e1c (<strong>Other<\/strong>), T\u00e0i li\u1ec7u (<strong>Document<\/strong>), v\u00e0 T\u00e0i nguy\u00ean \u0111a ph\u01b0\u01a1ng ti\u1ec7n (<strong>Media<\/strong>).<\/li><li>C\u1ed9t <strong>Third-party<\/strong> kh\u00f4ng \u0111\u01b0\u1ee3c t\u00ednh gi\u00e1 tr\u1ecb v\u00e0o h\u00e0ng <strong>Total<\/strong>. M\u1ee5c \u0111\u00edch l\u00e0 \u0111\u1ec3 b\u1ea1n \u00fd th\u1ee9c h\u01a1n v\u1ec1 t\u1ed5ng s\u1ed1 y\u00eau c\u1ea7u v\u00e0 c\u00f3 bao nhi\u00eau d\u1eef li\u1ec7u l\u01b0u chuy\u1ec3n \u0111\u1ebfn t\u1eeb c\u00e1c t\u00ean mi\u1ec1n c\u1ee7a b\u00ean th\u1ee9 ba. <a href=\"https:\/\/kiencang.net\/tai-nguyen-ben-thu-ba-wordpress\/\" target=\"_blank\" rel=\"noreferrer noopener\">C\u00e1c y\u00eau c\u1ea7u c\u1ee7a b\u00ean th\u1ee9 ba<\/a> c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p t\u1eeb b\u1ea5t k\u1ef3 ki\u1ec3u d\u1ea1ng ngu\u1ed3n t\u00e0i nguy\u00ean b\u00ean ngo\u00e0i n\u00e0o.<\/li><\/ul>\n\n\n<p><span style=\"text-decoration: underline;\">L\u01b0u \u00fd<\/span>: Gi\u1ed1ng nh\u01b0 t\u1ea5t c\u1ea3 c\u00e1c ki\u1ec3m tra <strong>ch\u1ea9n \u0111o\u00e1n<\/strong> kh\u00e1c, ki\u1ec3m tra <strong>Gi\u1eef s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u th\u1ea5p v\u00e0 d\u1eef li\u1ec7u t\u1ea3i v\u1ec1 k\u00edch c\u1ee1 nh\u1ecf<\/strong> kh\u00f4ng tr\u1ef1c ti\u1ebfp \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111i\u1ec3m s\u1ed1 <strong>hi\u1ec7u su\u1ea5t, t\u1ed1c \u0111\u1ed9<\/strong> (performance score). Tuy nhi\u00ean vi\u1ec7c gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u v\u00e0 k\u00edch c\u1ee1 l\u01b0u chuy\u1ec3n c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n c\u00e1c ch\u1ec9 s\u1ed1 hi\u1ec7u su\u1ea5t kh\u00e1c.<\/p>\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_60 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >M\u1ee5c l\u1ee5c<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\" role=\"button\"><label for=\"item-6577d6d21c3a0\" ><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input aria-label=\"Toggle\" aria-label=\"item-6577d6d21c3a0\"  type=\"checkbox\" id=\"item-6577d6d21c3a0\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/kiencang.net\/tom-tat-tai-nguyen\/#Cach_giam_so_luong_tai_nguyen_va_kich_co_luu_chuyen\" title=\"C\u00e1ch gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng t\u00e0i nguy\u00ean v\u00e0 k\u00edch c\u1ee1 l\u01b0u chuy\u1ec3n\">C\u00e1ch gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng t\u00e0i nguy\u00ean v\u00e0 k\u00edch c\u1ee1 l\u01b0u chuy\u1ec3n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/kiencang.net\/tom-tat-tai-nguyen\/#CSS_va_JavaScript\" title=\"CSS v\u00e0 JavaScript\">CSS v\u00e0 JavaScript<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/kiencang.net\/tom-tat-tai-nguyen\/#Anh\" title=\"\u1ea2nh\">\u1ea2nh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/kiencang.net\/tom-tat-tai-nguyen\/#Font\" title=\"Font\">Font<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/kiencang.net\/tom-tat-tai-nguyen\/#Tai_lieu\" title=\"T\u00e0i li\u1ec7u\">T\u00e0i li\u1ec7u<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/kiencang.net\/tom-tat-tai-nguyen\/#Tai_nguyen_da_phuong_tien\" title=\"T\u00e0i nguy\u00ean \u0111a ph\u01b0\u01a1ng ti\u1ec7n\">T\u00e0i nguy\u00ean \u0111a ph\u01b0\u01a1ng ti\u1ec7n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/kiencang.net\/tom-tat-tai-nguyen\/#Su_dung_ngan_sach_hieu_suat_de_ngan_van_de_hoi_quy\" title=\"S\u1eed d\u1ee5ng ng\u00e2n s\u00e1ch hi\u1ec7u su\u1ea5t \u0111\u1ec3 ng\u0103n v\u1ea5n \u0111\u1ec1 h\u1ed3i quy\">S\u1eed d\u1ee5ng ng\u00e2n s\u00e1ch hi\u1ec7u su\u1ea5t \u0111\u1ec3 ng\u0103n v\u1ea5n \u0111\u1ec1 h\u1ed3i quy<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"cach-gi\u1ea3m-s\u1ed1-l\u01b0\u1ee3ng-tai-nguyen-va-kich-c\u1ee1-l\u01b0u-chuy\u1ec3n\"><span class=\"ez-toc-section\" id=\"Cach_giam_so_luong_tai_nguyen_va_kich_co_luu_chuyen\"><\/span>C\u00e1ch gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng t\u00e0i nguy\u00ean v\u00e0 k\u00edch c\u1ee1 l\u01b0u chuy\u1ec3n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<p>\u1ea2nh h\u01b0\u1edfng c\u1ee7a <em>s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u cao ho\u1eb7c k\u00edch c\u1ee1 t\u00e0i nguy\u00ean l\u01b0u chuy\u1ec3n l\u1edbn<\/em> \u0111\u1ebfn hi\u1ec7u su\u1ea5t t\u1ea3i ph\u1ee5 thu\u1ed9c v\u00e0o ki\u1ec3u t\u00e0i nguy\u00ean n\u00e0o \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u.<\/p>\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n<h2 class=\"wp-block-heading\" id=\"css-va-javascript\"><span class=\"ez-toc-section\" id=\"CSS_va_JavaScript\"><\/span>CSS v\u00e0 JavaScript<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<p>C\u00e1c y\u00eau c\u1ea7u t\u1edbi file CSS v\u00e0 JavaScript l\u00e0 <a href=\"https:\/\/kiencang.net\/loai-bo-tai-nguyen-chan-hien-thi\/\" target=\"_blank\" rel=\"noreferrer noopener\">ch\u1eb7n hi\u1ec3n th\u1ecb theo m\u1eb7c \u0111\u1ecbnh<\/a>. N\u00f3i c\u00e1ch kh\u00e1c, c\u00e1c tr\u00ecnh duy\u1ec7t kh\u00f4ng th\u1ec3 <a href=\"https:\/\/kiencang.net\/cach-trang-web-tai-va-hien-thi\/\" target=\"_blank\" rel=\"noreferrer noopener\">k\u1ebft xu\u1ea5t n\u1ed9i dung (render content) l\u00ean m\u00e0n h\u00ecnh<\/a> cho \u0111\u1ebfn khi t\u1ea5t c\u1ea3 c\u00e1c y\u00eau c\u1ea7u CSS v\u00e0 JavaScript ho\u00e0n th\u00e0nh xong xu\u00f4i. <\/p>\n\n\n<p>N\u1ebfu c\u00f3 b\u1ea5t k\u1ef3 file n\u00e0o b\u1ecb host tr\u00ean m\u00e1y ch\u1ee7 ch\u1eadm, m\u00e1y ch\u1ee7 ch\u1eadm duy nh\u1ea5t \u0111\u00f3 c\u00f3 th\u1ec3 tr\u00ec ho\u00e3n to\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh k\u1ebft xu\u1ea5t. B\u1ea1n c\u00f3 th\u1ec3 xem th\u00eam c\u00e1c b\u00e0i vi\u1ebft v\u1ec1 ch\u1ee7 \u0111\u1ec1 sau: T\u1ed1i \u01b0u h\u00f3a JavaScript c\u1ee7a b\u1ea1n, <a href=\"https:\/\/kiencang.net\/tai-javascript-ben-thu-ba\/\" target=\"_blank\" rel=\"noreferrer noopener\">T\u1ed1i \u01b0u h\u00f3a t\u00e0i nguy\u00ean c\u1ee7a b\u00ean th\u1ee9 ba<\/a>, v\u00e0 <a href=\"https:\/\/kiencang.net\/toi-uu-hoa-phan-phoi-css\/\" target=\"_blank\" rel=\"noreferrer noopener\">T\u1ed1i \u01b0u h\u00f3a CSS<\/a> c\u1ee7a b\u1ea1n \u0111\u1ec3 h\u1ecdc c\u00e1ch ch\u1ec9 g\u1eedi cho ng\u01b0\u1eddi d\u00f9ng c\u00e1c \u0111o\u1ea1n m\u00e3 th\u1ef1c s\u1ef1 c\u1ea7n thi\u1ebft m\u00e0 th\u00f4i.<\/p>\n\n\n<p>M\u1ee9c \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ec9 s\u1ed1 \u0111o t\u1ed1c \u0111\u1ed9 \u0111\u1ed9: T\u1ea5t c\u1ea3 c\u00e1c ch\u1ec9 s\u1ed1.<\/p>\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n<h2 class=\"wp-block-heading\" id=\"\u1ea3nh\"><span class=\"ez-toc-section\" id=\"Anh\"><\/span>\u1ea2nh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<p>C\u00e1c y\u00eau c\u1ea7u \u0111\u1ebfn t\u00e0i nguy\u00ean \u1ea3nh kh\u00f4ng ch\u1eb7n hi\u1ec3n th\u1ecb (render-blocking) gi\u1ed1ng nh\u01b0 CSS v\u00e0 JavaScript, nh\u01b0ng ch\u00fang v\u1eabn c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng ti\u00eau c\u1ef1c \u0111\u1ebfn hi\u1ec7u su\u1ea5t t\u1ea3i, t\u1ed1c \u0111\u1ed9 c\u1ee7a trang. <\/p>\n\n\n<p>M\u1ed9t v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn l\u00e0 khi ng\u01b0\u1eddi d\u00f9ng di \u0111\u1ed9ng t\u1ea3i trang v\u00e0 th\u1ea5y c\u00e1c \u1ea3nh t\u1ea3i v\u1ec1 nh\u01b0ng s\u1ebd ph\u1ea3i \u0111\u1ee3i m\u1ed9t l\u00fac \u0111\u1ec3 ch\u00fang t\u1ea3i xong. Xem <a href=\"https:\/\/kiencang.net\/toi-uu-hoa-toc-do-tai-anh\/\" target=\"_blank\" rel=\"noreferrer noopener\">C\u00e1ch t\u1ed1i \u01b0u h\u00f3a \u1ea3nh<\/a> \u0111\u1ec3 bi\u1ebft c\u00e1ch t\u1ea3i \u1ea3nh nhanh h\u01a1n.<\/p>\n\n\n<p>M\u1ee9c \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c ch\u1ec9 s\u1ed1: <a href=\"https:\/\/kiencang.net\/first-contentful-paint-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">First Contentful Paint<\/a>, First Meaningful Paint, Speed Index.<\/p>\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n<h2 class=\"wp-block-heading\" id=\"font\"><span class=\"ez-toc-section\" id=\"Font\"><\/span>Font<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<p>\u1ea2nh h\u01b0\u1edfng c\u1ee7a vi\u1ec7c t\u1ea3i c\u00e1c file font c\u00f3 th\u1ec3 l\u00e0 nguy\u00ean nh\u00e2n g\u00e2y \u1ea9n v\u0103n b\u1ea3n trong khi t\u1ea3i trang. Xem b\u00e0i vi\u1ebft <a href=\"https:\/\/kiencang.net\/dam-bao-van-ban-hien-thi\/\" target=\"_blank\" rel=\"noreferrer noopener\">T\u1ed1i \u01b0u h\u00f3a font c\u1ee7a b\u1ea1n<\/a> \u0111\u1ec3 h\u1ecdc c\u00e1ch s\u1eed d\u1ee5ng font m\u1eb7c \u0111\u1ecbnh c\u00f3 s\u1eb5n tr\u00ean thi\u1ebft b\u1ecb c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 chuy\u1ec3n sang font t\u00f9y ch\u1ec9nh khi n\u00f3 \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1ea3i xong.<\/p>\n\n\n<p>M\u1ee9c \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c ch\u1ec9 s\u1ed1: <a href=\"https:\/\/kiencang.net\/first-contentful-paint-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">First Contentful Paint<\/a>.<\/p>\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n<h2 class=\"wp-block-heading\" id=\"tai-li\u1ec7u\"><span class=\"ez-toc-section\" id=\"Tai_lieu\"><\/span>T\u00e0i li\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<p>N\u1ebfu file HTML c\u1ee7a b\u1ea1n c\u00f3 k\u00edch c\u1ee1 l\u1edbn, tr\u00ecnh duy\u1ec7t s\u1ebd m\u1ea5t nhi\u1ec1u th\u1eddi gian h\u01a1n \u0111\u1ec3 ph\u00e2n t\u00edch c\u00fa ph\u00e1p v\u00e0 <a href=\"https:\/\/kiencang.net\/dom-wordpress\/\" target=\"_blank\" rel=\"noreferrer noopener\">x\u00e2y d\u1ef1ng c\u00e2y DOM<\/a> t\u1eeb qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch c\u00fa ph\u00e1p HTML \u0111\u00f3.<\/p>\n\n\n<p>M\u1ee9c \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c ch\u1ec9 s\u1ed1: <a href=\"https:\/\/kiencang.net\/first-contentful-paint-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">First Contentful Paint<\/a>.<\/p>\n\n\n<p>M\u1ed9t c\u00e1ch \u0111\u1ec3 gi\u1ea3m \u1ea3nh h\u01b0\u1edfng c\u1ee7a l\u01b0\u1ee3ng d\u1eef li\u1ec7u HTML l\u1edbn trong click k\u1ebf ti\u1ebfp l\u00e0 <a href=\"https:\/\/kiencang.net\/link-prefetch\/\" target=\"_blank\" rel=\"noreferrer noopener\">s\u1eed d\u1ee5ng prefetch<\/a>, m\u1ed9t c\u00e1ch nhanh ch\u00f3ng \u0111\u1ec3 \u00e1p d\u1ee5ng \u0111i\u1ec1u n\u00e0y tr\u00ean c\u00e1c trang WordPress l\u00e0 s\u1eed d\u1ee5ng <a href=\"https:\/\/kiencang.net\/plugin-flying-pages\/\" target=\"_blank\" rel=\"noreferrer noopener\">plugin Flying Pages<\/a>.<\/p>\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n<h2 class=\"wp-block-heading\" id=\"tai-nguyen-da-ph\u01b0\u01a1ng-ti\u1ec7n\"><span class=\"ez-toc-section\" id=\"Tai_nguyen_da_phuong_tien\"><\/span>T\u00e0i nguy\u00ean \u0111a ph\u01b0\u01a1ng ti\u1ec7n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<p><a href=\"https:\/\/kiencang.net\/gif-png-jpg-hoac-svg\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u1ea2nh \u0111\u1ed9ng GIF<\/a> th\u01b0\u1eddng l\u00e0 file c\u00f3 k\u00edch c\u1ee1 l\u1edbn. B\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o b\u00e0i vi\u1ebft v\u1ec1 ch\u1ee7 \u0111\u1ec1 C\u00e1ch thay th\u1ebf \u1ea3nh GIF b\u1eb1ng video \u0111\u1ec3 h\u1ecdc c\u00e1ch t\u1ea3i \u1ea3nh \u0111\u1ed9ng nhanh h\u01a1n.<\/p>\n\n\n<p>M\u1ee9c \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1ch ch\u1ec9 s\u1ed1: <a href=\"https:\/\/kiencang.net\/first-contentful-paint-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">First Contentful Paint<\/a>.<\/p>\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n<h2 class=\"wp-block-heading\" id=\"s\u1eed-d\u1ee5ng-ngan-sach-hi\u1ec7u-su\u1ea5t-d\u1ec3-ngan-v\u1ea5n-d\u1ec1-h\u1ed3i-quy\"><span class=\"ez-toc-section\" id=\"Su_dung_ngan_sach_hieu_suat_de_ngan_van_de_hoi_quy\"><\/span>S\u1eed d\u1ee5ng ng\u00e2n s\u00e1ch hi\u1ec7u su\u1ea5t \u0111\u1ec3 ng\u0103n v\u1ea5n \u0111\u1ec1 h\u1ed3i quy<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<p>Sau khi b\u1ea1n \u0111\u00e3 t\u1ed1i \u01b0u h\u00f3a xong xu\u00f4i m\u00e3 trang web \u0111\u1ec3 gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u v\u00e0 k\u00edch c\u1ee1 t\u1ea3i v\u1ec1, b\u1ea1n h\u00e3y tham kh\u1ea3o b\u00e0i vi\u1ebft <a href=\"https:\/\/kiencang.net\/performance-budget-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">Thi\u1ebft l\u1eadp ng\u00e2n s\u00e1ch hi\u1ec7u su\u1ea5t (performance budget)<\/a> \u0111\u1ec3 bi\u1ebft c\u00e1ch ng\u0103n ch\u1eb7n v\u1ea5n \u0111\u1ec1 h\u1ed3i quy.<\/p>\n\n\n<p><em>(D\u1ecbch t\u1eeb b\u00e0i vi\u1ebft: Keep request counts low and transfer sizes small, trang web[.]dev)<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Lighthouse l\u1eadp b\u00e1o c\u00e1o cung c\u1ea5p th\u00f4ng tin c\u00f3 bao nhi\u00eau y\u00eau c\u1ea7u m\u1ea1ng (network requests) \u0111\u01b0\u1ee3c t\u1ea1o ra v\u00e0 bao nhi\u00eau d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u chuy\u1ec3n (data was transferred) trong khi trang c\u1ee7a b\u1ea1n t\u1ea3i v\u1ec1: S\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u (Request) v\u00e0 K\u00edch c\u1ee1 l\u01b0u chuy\u1ec3n (Transfer Size) cho h\u00e0ng Total (t\u1ed5ng s\u1ed1) \u0111\u01b0\u1ee3c &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[282],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Gi\u1eef s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u th\u1ea5p v\u00e0 k\u00edch c\u1ee1 t\u1ea3i v\u1ec1 nh\u1ecf &#8226; Ki\u1ebfn c\u00e0ng<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kiencang.net\/tom-tat-tai-nguyen\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Gi\u1eef s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u th\u1ea5p v\u00e0 k\u00edch c\u1ee1 t\u1ea3i v\u1ec1 nh\u1ecf &#8226; Ki\u1ebfn c\u00e0ng\" \/>\n<meta property=\"og:description\" content=\"Lighthouse l\u1eadp b\u00e1o c\u00e1o cung c\u1ea5p th\u00f4ng tin c\u00f3 bao nhi\u00eau y\u00eau c\u1ea7u m\u1ea1ng (network requests) \u0111\u01b0\u1ee3c t\u1ea1o ra v\u00e0 bao nhi\u00eau d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u chuy\u1ec3n (data was transferred) trong khi trang c\u1ee7a b\u1ea1n t\u1ea3i v\u1ec1: S\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u (Request) v\u00e0 K\u00edch c\u1ee1 l\u01b0u chuy\u1ec3n (Transfer Size) cho h\u00e0ng Total (t\u1ed5ng s\u1ed1) \u0111\u01b0\u1ee3c &hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/kiencang.net\/tom-tat-tai-nguyen\/\" \/>\n<meta property=\"og:site_name\" content=\"Ki\u1ebfn c\u00e0ng\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/anhducnguyen87\/\" \/>\n<meta property=\"article:published_time\" content=\"2020-04-04T06:07:04+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/kiencang.net\/wp-content\/uploads\/2020\/04\/tom-tat-tai-nguyen.png\" \/>\n<meta name=\"author\" content=\"Nguy\u1ec5n \u0110\u1ee9c Anh\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"Nguy\u1ec5n \u0110\u1ee9c Anh\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 ph\u00fat\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Gi\u1eef s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u th\u1ea5p v\u00e0 k\u00edch c\u1ee1 t\u1ea3i v\u1ec1 nh\u1ecf &#8226; 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T\u00f4i th\u00edch Content, SEO, Ads, T\u0103ng t\u1ed1c website v\u00e0 Th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed. B\u00ean c\u1ea1nh b\u00e0i t\u1ef1 vi\u1ebft, t\u00f4i c\u0169ng d\u1ecbch nhi\u1ec1u n\u1ed9i dung th\u00fa v\u1ecb c\u1ee7a c\u00e1c t\u00e1c gi\u1ea3 kh\u00e1c nhau. FB c\u00e1 nh\u00e2n: facebook.com\/anhducnguyen87. Email li\u00ean h\u1ec7: guiemailchotoi@gmail.com","sameAs":["https:\/\/www.facebook.com\/anhducnguyen87\/"],"url":"https:\/\/kiencang.net\/author\/admin\/"}]}},"_links":{"self":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/posts\/15841"}],"collection":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/comments?post=15841"}],"version-history":[{"count":0,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/posts\/15841\/revisions"}],"wp:attachment":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/media?parent=15841"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/categories?post=15841"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/tags?post=15841"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}