{"id":324,"date":"2017-05-14T09:00:32","date_gmt":"2017-05-14T09:00:32","guid":{"rendered":"http:\/\/imalogic.com\/blog\/?p=324"},"modified":"2017-07-19T12:34:28","modified_gmt":"2017-07-19T12:34:28","slug":"benchmarking-c-net-direct3d-11-apis-vs-native-c","status":"publish","type":"post","link":"https:\/\/imalogic.com\/blog\/2017\/05\/14\/benchmarking-c-net-direct3d-11-apis-vs-native-c\/","title":{"rendered":"Benchmarking C#\/.Net Direct3D 11 APIs vs native C++"},"content":{"rendered":"

<\/p>This is a resume from a old post found on internet about benchmarking\u00a0Direct3D 11.<\/strong>\n

$\"\"$ <\/a>If you are working with a managed language like C# and you are concerned by performance, you probably know that, even if the Microsoft JIT CLR is quite efficient, It has a significant cost over a pure C++ implementation. If you don\u2019t know much about this cost, you have probably heard about a mean cost for managed languages around 15-20%. If you are really concern by this, and depending on the cases, you know that the reality of a calculation-intensive managed application is more often around x2 or even x3 slower than its C++ counterpart.<\/p>\n

In this post, I\u2019m going to present a result of micro-benchmark that measure the cost of calling a native Direct3D 11 API from a C# application, using various API, ranging from SharpDX<\/a>, SlimDX, WindowsCodecPack.<\/p>\n

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Direct3D11 Simple Bench<\/td>\n	x86 (ms)<\/td>\n	x64 (ms)<\/td>\n	x86-ratio<\/td>\n	x64-ratio<\/td>\n<\/tr>\n
Native C++ (MSVC VS2010)<\/span><\/td>\n	0.000386<\/span><\/td>\n	0.000262<\/span><\/td>\n	x1.00<\/span><\/td>\n	x1.00<\/span><\/td>\n<\/tr>\n
Managed SharpDX (1.3 MS .Net CLR)<\/span><\/td>\n	0.000585<\/span><\/td>\n	0.000607<\/span><\/td>\n	x1.52<\/span><\/td>\n	x2.32<\/span><\/td>\n<\/tr>\n
Managed SlimDX (June 2010 \u2013 Ngen)<\/span><\/td>\n	0.000945<\/span><\/td>\n	0.000886<\/span><\/td>\n	x2.45<\/span><\/td>\n	x3.38<\/span><\/td>\n<\/tr>\n
Managed SharpDX (1.3 Mono-2.10)<\/strong><\/span><\/td>\n	0.002404<\/strong><\/span><\/td>\n	0.001872<\/strong><\/span><\/td>\n	x6.23<\/strong><\/span><\/td>\n	x7.15<\/strong><\/span><\/td>\n<\/tr>\n
Managed Windows API CodePack 1.1<\/strong><\/span><\/td>\n	0.002551<\/strong><\/span><\/td>\n	0.003219<\/strong><\/span><\/td>\n	x6.61<\/strong><\/span><\/td>\n	x12.29<\/strong><\/span><\/td>\n<\/tr>\n
<\/td>\n	<\/td>\n	<\/td>\n	<\/td>\n	<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n And the associated graphs comparison both for x86 and x64 platforms:<\/p>\n $\"\"$ <\/a><\/p>\n $\"\"$ <\/a><\/p>\n Results are pretty self explanatory. Although we can highlight some interesting facts:<\/p>\n \n Managed Direct3D API calls are much slower than native API calls<\/b>, ranging from x1.52 to x10 depending on the API you are using.<\/li>\n SharpDX is providing the fastest Direct3D managed API<\/b>, which is ranging only from x1.52 to x2.32 slower than C++, at least 50% faster than any other managed APIs.<\/li>\n All other Direct3D managed API are significantly slower<\/b>, ranging from x2.45 to x12.29<\/li>\n Running this benchmark with SharpDX and Mono 2.10 is x6 to x7 times slower than SharpDX with Microsoft JIT <\/b>(!)<\/li>\n<\/ul>\n \u00a0<\/p>\n<\/body>","protected":false},"excerpt":{"rendered":" This is a resume from a old post found on internet about benchmarking\u00a0Direct3D 11. If you are working with a<\/p>\n","protected":false},"author":1,"featured_media":328,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[7],"tags":[],"class_list":["post-324","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-coding"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/imalogic.com\/blog\/wp-content\/uploads\/2017\/05\/t%C3%A9l%C3%A9chargement.jpg?fit=310%2C163&ssl=1","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8J21V-5e","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/imalogic.com\/blog\/wp-json\/wp\/v2\/posts\/324","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/imalogic.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/imalogic.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/imalogic.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/imalogic.com\/blog\/wp-json\/wp\/v2\/comments?post=324"}],"version-history":[{"count":1,"href":"https:\/\/imalogic.com\/blog\/wp-json\/wp\/v2\/posts\/324\/revisions"}],"predecessor-version":[{"id":485,"href":"https:\/\/imalogic.com\/blog\/wp-json\/wp\/v2\/posts\/324\/revisions\/485"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/imalogic.com\/blog\/wp-json\/wp\/v2\/media\/328"}],"wp:attachment":[{"href":"https:\/\/imalogic.com\/blog\/wp-json\/wp\/v2\/media?parent=324"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/imalogic.com\/blog\/wp-json\/wp\/v2\/categories?post=324"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/imalogic.com\/blog\/wp-json\/wp\/v2\/tags?post=324"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}