Browser's version: Nightly 56.0a1 (2017-07-21) (64-bit) Description: Playing of * fullscreen videos (trailers) on https://www.csfd.cz/ * fullscreen advertisements on https://www.youtube.com/ is very poor - low FPS performance, tearing videos. Audio is ok. Also playing becomes ok if I exit fullscreen and play it on page only. Steps to Reproduce on https://www.csfd.cz/: 0. I have iMac (Retina 5K, 27-inch, Late 2015) hardware, maybe it is prerequisite. 1. Visit https://www.csfd.cz/ 2. Click on "play" of some trailer (video) 3. Go to "fullscreen" during playing of trailer/video Steps to Reproduce on https://www.youtube.com/: 0. I have iMac (Retina 5K, 27-inch, Late 2015) hardware, maybe it is prerequisite. 1. Visit https://www.youtube.com/ 2. Click on "play" of some video and go to "fullscreen" 3. Wait until some advertisement shows up, then the performance is poor. During of playing normal video the performance is ok. Actual Results: Playing of fullscreen video is very poor / low FPS. Video is tearing because of low FPS. Audio is ok. After exitting of fullscreen, FPS of video returns to normal state, probably 60 fps. Expected Results: At least 30 FPS of playing of fullscreen videos and no tearing of videos during fullscreen playing. I made performance profiles of the issue: * https://www.csfd.cz/ >> https://perfht.ml/2vJAdAB * https://www.youtube.com/ >> https://perfht.ml/2vta7m4 I would estimate, that the problem is related to high amount of pixels of retina display. If you would like to receive more information, please let me know. Thank you in advance.

Can you please provide the graphics section of about:support?

(In reply to Anthony Jones (:kentuckyfriedtakahe, :k17e) from comment #1) > Can you please provide the graphics section of about:support? Yes. Here is it: Graphics Features Compositing OpenGL Asynchronous Pan/Zoom wheel input enabled; scrollbar drag enabled WebGL 1 Driver WSI Info CGL WebGL 1 Driver Renderer ATI Technologies Inc. -- AMD Radeon R9 M395 OpenGL Engine WebGL 1 Driver Version 4.1 ATI-1.51.8 WebGL 1 Driver Extensions GL_ARB_blend_func_extended GL_ARB_draw_buffers_blend GL_ARB_draw_indirect GL_ARB_ES2_compatibility GL_ARB_explicit_attrib_location GL_ARB_gpu_shader_fp64 GL_ARB_gpu_shader5 GL_ARB_instanced_arrays GL_ARB_internalformat_query GL_ARB_occlusion_query2 GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_shader_subroutine GL_ARB_shading_language_include GL_ARB_tessellation_shader GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_cube_map_array GL_ARB_texture_gather GL_ARB_texture_query_lod GL_ARB_texture_rgb10_a2ui GL_ARB_texture_storage GL_ARB_texture_swizzle GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_vertex_attrib_64bit GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_depth_bounds_test GL_EXT_texture_compression_s3tc GL_EXT_texture_filter_anisotropic GL_EXT_texture_mirror_clamp GL_EXT_texture_sRGB_decode GL_APPLE_client_storage GL_APPLE_container_object_shareable GL_APPLE_flush_render GL_APPLE_object_purgeable GL_APPLE_rgb_422 GL_APPLE_row_bytes GL_APPLE_texture_range GL_ATI_texture_mirror_once GL_NV_texture_barrier WebGL 1 Extensions ANGLE_instanced_arrays EXT_blend_minmax EXT_color_buffer_half_float EXT_frag_depth EXT_sRGB EXT_shader_texture_lod EXT_texture_filter_anisotropic EXT_disjoint_timer_query MOZ_debug OES_element_index_uint OES_standard_derivatives OES_texture_float OES_texture_float_linear OES_texture_half_float OES_texture_half_float_linear OES_vertex_array_object WEBGL_color_buffer_float WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_depth_texture WEBGL_draw_buffers WEBGL_lose_context MOZ_WEBGL_lose_context MOZ_WEBGL_compressed_texture_s3tc MOZ_WEBGL_depth_texture WebGL 2 Driver WSI Info CGL WebGL 2 Driver Renderer ATI Technologies Inc. -- AMD Radeon R9 M395 OpenGL Engine WebGL 2 Driver Version 4.1 ATI-1.51.8 WebGL 2 Driver Extensions GL_ARB_blend_func_extended GL_ARB_draw_buffers_blend GL_ARB_draw_indirect GL_ARB_ES2_compatibility GL_ARB_explicit_attrib_location GL_ARB_gpu_shader_fp64 GL_ARB_gpu_shader5 GL_ARB_instanced_arrays GL_ARB_internalformat_query GL_ARB_occlusion_query2 GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_shader_subroutine GL_ARB_shading_language_include GL_ARB_tessellation_shader GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_cube_map_array GL_ARB_texture_gather GL_ARB_texture_query_lod GL_ARB_texture_rgb10_a2ui GL_ARB_texture_storage GL_ARB_texture_swizzle GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_vertex_attrib_64bit GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_depth_bounds_test GL_EXT_texture_compression_s3tc GL_EXT_texture_filter_anisotropic GL_EXT_texture_mirror_clamp GL_EXT_texture_sRGB_decode GL_APPLE_client_storage GL_APPLE_container_object_shareable GL_APPLE_flush_render GL_APPLE_object_purgeable GL_APPLE_rgb_422 GL_APPLE_row_bytes GL_APPLE_texture_range GL_ATI_texture_mirror_once GL_NV_texture_barrier WebGL 2 Extensions EXT_color_buffer_float EXT_texture_filter_anisotropic EXT_disjoint_timer_query MOZ_debug OES_texture_float_linear WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_lose_context MOZ_WEBGL_lose_context MOZ_WEBGL_compressed_texture_s3tc GPU #1 Active Yes Vendor ID 0x1002 Device ID 0x6920 GPU #2 Diagnostics AzureCanvasAccelerated 1 AzureCanvasBackend skia AzureContentBackend skia AzureFallbackCanvasBackend none TileHeight 1024 TileWidth 1024 Decision Log WEBRENDER opt-in by default: WebRender is an opt-in feature Crash Guard Disabled Features Workarounds Failure Log

Mass change P1->P2 to align with new Mozilla triage process

Could not reproduce the issue on both Firefox release 56.0 and Nightly 58.0a1 on OSX 10.11.4. Do you still get this issue now? Thanks!

(In reply to Alastor Wu [:alwu][please needinfo me][GMT+8] from comment #4) > Could not reproduce the issue on both Firefox release 56.0 and Nightly > 58.0a1 on OSX 10.11.4. > Do you still get this issue now? > Thanks! I made some testing and there is result for Firefox 56.0 release: NO ISSUE: Stručně o aplikaci ------------------ Název: Firefox Verze: 56.0 Id buildu: 20170926190823 Kanál aktualizací: release Identifikace prohlížeče: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:56.0) Gecko/20100101 Firefox/56.0 OS: Darwin 16.7.0 Multiprocesová okna: 0/1 (Zakázáno) Procesy pro webový obsah: Stylo: false (zakázáno ve výchozím nastavení) Klíč Google: Nalezeno Klíč Mozilla Location Service: Nalezeno Nouzový režim: false Hlášení o pádech za poslední 3 dny ---------------------------------- Všechna hlášení o pádech Funkce aplikace Firefox ----------------------- Rozšíření --------- Grafika ------- Vlastnosti GPU #1 GPU #2 Diagnostika Protokol rozhodování Zakázat funkce Crash Guard Možná řešení Protokol chyb Média ----- Výstupní zařízení Název: Skupina Vstupní zařízení Název: Skupina Důležité změněné předvolby -------------------------- Důležité uzamčené předvolby --------------------------- Databáze Places --------------- JavaScript ---------- Inkrementální GC: Přístupnost ----------- Aktivována: Zakázána: Verze knihoven -------------- Experimentální funkce --------------------- Sandbox -------

There is result for 57.0b4 beta channel: ISSUE PERSIST, STILL REPRODUCIBLE: Stručně o aplikaci ------------------ Název: Firefox Verze: 57.0b4 Id buildu: 20170928180207 Kanál aktualizací: beta Identifikace prohlížeče: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:57.0) Gecko/20100101 Firefox/57.0 OS: Darwin 16.7.0 Multiprocesová okna: 1/1 (Povoleno ve výchozím nastavení) Procesy pro webový obsah: 1/4 Stylo: true (povoleno ve výchozím nastavení) Klíč Google: Nalezeno Klíč Mozilla Location Service: Nalezeno Nouzový režim: false Hlášení o pádech za poslední 3 dny ---------------------------------- Všechna hlášení o pádech Funkce aplikace Firefox ----------------------- Název: Activity Stream Verze: 2017.09.22.1389-2ee94db4 ID: activity-stream@mozilla.org Název: Application Update Service Helper Verze: 2.0 ID: aushelper@mozilla.org Název: Firefox Screenshots Verze: 19.1.0 ID: screenshots@mozilla.org Název: Follow-on Search Telemetry Verze: 0.9.3 ID: followonsearch@mozilla.com Název: Form Autofill Verze: 1.0 ID: formautofill@mozilla.org Název: Multi-process staged rollout Verze: 3.00 ID: e10srollout@mozilla.org Název: Photon onboarding Verze: 0.1 ID: onboarding@mozilla.org Název: Pocket Verze: 1.0.5 ID: firefox@getpocket.com Název: Shield Recipe Client Verze: 73 ID: shield-recipe-client@mozilla.org Název: Web Compat Verze: 1.1 ID: webcompat@mozilla.org Rozšíření --------- Grafika ------- Vlastnosti Skládání: OpenGL Asynchronní lupa/panning: vstup kolečka povolen; táhnutí posuvníkem povoleno; klávesnice povolena; automatické posunování povoleno Informace o ovladači WebGL 1 WSI: CGL Ovladač pro zobrazování WebGL 1: ATI Technologies Inc. -- AMD Radeon R9 M395 OpenGL Engine Verze ovladače WebGL 1: 4.1 ATI-1.51.8 Rozšíření ovladače WebGL 1: GL_ARB_blend_func_extended GL_ARB_draw_buffers_blend GL_ARB_draw_indirect GL_ARB_ES2_compatibility GL_ARB_explicit_attrib_location GL_ARB_gpu_shader_fp64 GL_ARB_gpu_shader5 GL_ARB_instanced_arrays GL_ARB_internalformat_query GL_ARB_occlusion_query2 GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_shader_subroutine GL_ARB_shading_language_include GL_ARB_tessellation_shader GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_cube_map_array GL_ARB_texture_gather GL_ARB_texture_query_lod GL_ARB_texture_rgb10_a2ui GL_ARB_texture_storage GL_ARB_texture_swizzle GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_vertex_attrib_64bit GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_depth_bounds_test GL_EXT_texture_compression_s3tc GL_EXT_texture_filter_anisotropic GL_EXT_texture_mirror_clamp GL_EXT_texture_sRGB_decode GL_APPLE_client_storage GL_APPLE_container_object_shareable GL_APPLE_flush_render GL_APPLE_object_purgeable GL_APPLE_rgb_422 GL_APPLE_row_bytes GL_APPLE_texture_range GL_ATI_texture_mirror_once GL_NV_texture_barrier Rozšíření WebGL 1: ANGLE_instanced_arrays EXT_blend_minmax EXT_color_buffer_half_float EXT_frag_depth EXT_sRGB EXT_shader_texture_lod EXT_texture_filter_anisotropic EXT_disjoint_timer_query OES_element_index_uint OES_standard_derivatives OES_texture_float OES_texture_float_linear OES_texture_half_float OES_texture_half_float_linear OES_vertex_array_object WEBGL_color_buffer_float WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_depth_texture WEBGL_draw_buffers WEBGL_lose_context MOZ_WEBGL_lose_context MOZ_WEBGL_compressed_texture_s3tc MOZ_WEBGL_depth_texture Informace o ovladači WebGL 2 WSI: CGL Zobrazování WebGL2: ATI Technologies Inc. -- AMD Radeon R9 M395 OpenGL Engine Verze ovladače WebGL 2: 4.1 ATI-1.51.8 Rozšíření ovladače WebGL 2: GL_ARB_blend_func_extended GL_ARB_draw_buffers_blend GL_ARB_draw_indirect GL_ARB_ES2_compatibility GL_ARB_explicit_attrib_location GL_ARB_gpu_shader_fp64 GL_ARB_gpu_shader5 GL_ARB_instanced_arrays GL_ARB_internalformat_query GL_ARB_occlusion_query2 GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_shader_subroutine GL_ARB_shading_language_include GL_ARB_tessellation_shader GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_cube_map_array GL_ARB_texture_gather GL_ARB_texture_query_lod GL_ARB_texture_rgb10_a2ui GL_ARB_texture_storage GL_ARB_texture_swizzle GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_vertex_attrib_64bit GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_depth_bounds_test GL_EXT_texture_compression_s3tc GL_EXT_texture_filter_anisotropic GL_EXT_texture_mirror_clamp GL_EXT_texture_sRGB_decode GL_APPLE_client_storage GL_APPLE_container_object_shareable GL_APPLE_flush_render GL_APPLE_object_purgeable GL_APPLE_rgb_422 GL_APPLE_row_bytes GL_APPLE_texture_range GL_ATI_texture_mirror_once GL_NV_texture_barrier Rozšíření WebGL 2: EXT_color_buffer_float EXT_texture_filter_anisotropic EXT_disjoint_timer_query OES_texture_float_linear WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_lose_context MOZ_WEBGL_lose_context MOZ_WEBGL_compressed_texture_s3tc GPU #1 Aktivní: Ano ID prodejce: 0x1002 ID zařízení: 0x6920 Diagnostika AzureCanvasAccelerated: 1 AzureCanvasBackend: skia AzureContentBackend: skia AzureFallbackCanvasBackend: none TileHeight: 1024 TileWidth: 1024 Protokol rozhodování WEBRENDER: opt-in by default: WebRender is an opt-in feature unavailable by runtime: Build doesn't include WebRender Média ----- Audio Backend: audiounit Maximální počet kanálů: 2 Preferované rozložení kanálů: stereo Preferovaná vzorkovací frekvence: 44100 Výstupní zařízení Název: Skupina Logitech USB Headset H540: AppleUSBAudioEngine:Logitech Inc :Logitech USB Headset H540:00000000:2 Sluchátka: AppleHDAEngineOutput:1F,3,0,1,2:0 Vstupní zařízení Název: Skupina Logitech USB Headset H540: AppleUSBAudioEngine:Logitech Inc :Logitech USB Headset H540:00000000:1 Interní mikrofon: AppleHDAEngineInput:1F,3,0,1,0:1 Důležité změněné předvolby -------------------------- browser.cache.disk.capacity: 358400 browser.cache.disk.filesystem_reported: 1 browser.cache.disk.smart_size.first_run: false browser.cache.frecency_experiment: 4 browser.places.smartBookmarksVersion: 8 browser.startup.homepage_override.buildID: 20170928180207 browser.startup.homepage_override.mstone: 57.0 browser.tabs.remote.autostart.2: true browser.urlbar.lastSuggestionsPromptDate: 20171002 browser.urlbar.timesBeforeHidingSuggestionsHint: 2 dom.ipc.processCount.web: 4 extensions.lastAppVersion: 57.0 media.gmp-gmpopenh264.abi: x86_64-gcc3 media.gmp-gmpopenh264.lastUpdate: 1506963789 media.gmp-gmpopenh264.version: 1.6 media.gmp-manager.buildID: 20170928180207 media.gmp-manager.lastCheck: 1506963788 media.gmp-widevinecdm.abi: x86_64-gcc3 media.gmp-widevinecdm.lastUpdate: 1506963790 media.gmp-widevinecdm.version: 1.4.8.1008 media.gmp.storage.version.observed: 1 network.cookie.prefsMigrated: true network.predictor.cleaned-up: true places.history.expiration.transient_current_max_pages: 104858 plugin.disable_full_page_plugin_for_types: application/pdf security.sandbox.content.tempDirSuffix: {12033db0-9e83-b042-a5bd-149e2813462e} Důležité uzamčené předvolby --------------------------- Databáze Places --------------- JavaScript ---------- Inkrementální GC: true Přístupnost ----------- Aktivována: false Zakázána: 0 Verze knihoven -------------- NSPR Očekávaná minimální verze: 4.17 Používaná verze: 4.17 NSS Očekávaná minimální verze: 3.33 Používaná verze: 3.33 NSSSMIME Očekávaná minimální verze: 3.33 Používaná verze: 3.33 NSSSSL Očekávaná minimální verze: 3.33 Používaná verze: 3.33 NSSUTIL Očekávaná minimální verze: 3.33 Používaná verze: 3.33 Experimentální funkce --------------------- Sandbox ------- Úroveň sandboxu procesů pro obsah: 3 Účinná úroveň sandboxu procesů pro obsah: 3

There is result for 58.0a1 nightly channel: ISSUE PERSIST, STILL REPRODUCIBLE: Application Basics ------------------ Name: Firefox Version: 58.0a1 Build ID: 20170929100122 Update Channel: nightly User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:58.0) Gecko/20100101 Firefox/58.0 OS: Darwin 16.7.0 Multiprocess Windows: 1/1 (Enabled by default) Web Content Processes: 2/4 Stylo: false (disabled by default) Google Key: Found Mozilla Location Service Key: Found Safe Mode: false Crash Reports for the Last 3 Days --------------------------------- All Crash Reports Nightly Features ---------------- Name: Activity Stream Version: 2017.09.28.0954-66ebf91c ID: activity-stream@mozilla.org Name: Application Update Service Helper Version: 2.0 ID: aushelper@mozilla.org Name: Firefox Screenshots Version: 19.1.0 ID: screenshots@mozilla.org Name: FlyWeb Version: 1.0.0 ID: flyweb@mozilla.org Name: Follow-on Search Telemetry Version: 0.9.3 ID: followonsearch@mozilla.com Name: Form Autofill Version: 1.0 ID: formautofill@mozilla.org Name: Multi-process staged rollout Version: 3.00 ID: e10srollout@mozilla.org Name: Photon onboarding Version: 0.1 ID: onboarding@mozilla.org Name: Pocket Version: 1.0.5 ID: firefox@getpocket.com Name: Presentation Version: 1.0.0 ID: presentation@mozilla.org Name: Shield Recipe Client Version: 76 ID: shield-recipe-client@mozilla.org Name: Web Compat Version: 1.1 ID: webcompat@mozilla.org Name: WebCompat Reporter Version: 1.0.0 ID: webcompat-reporter@mozilla.org Extensions ---------- Graphics -------- Features Compositing: OpenGL Asynchronous Pan/Zoom: wheel input enabled; scrollbar drag enabled; keyboard enabled; autoscroll enabled WebGL 1 Driver WSI Info: CGL WebGL 1 Driver Renderer: ATI Technologies Inc. -- AMD Radeon R9 M395 OpenGL Engine WebGL 1 Driver Version: 4.1 ATI-1.51.8 WebGL 1 Driver Extensions: GL_ARB_blend_func_extended GL_ARB_draw_buffers_blend GL_ARB_draw_indirect GL_ARB_ES2_compatibility GL_ARB_explicit_attrib_location GL_ARB_gpu_shader_fp64 GL_ARB_gpu_shader5 GL_ARB_instanced_arrays GL_ARB_internalformat_query GL_ARB_occlusion_query2 GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_shader_subroutine GL_ARB_shading_language_include GL_ARB_tessellation_shader GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_cube_map_array GL_ARB_texture_gather GL_ARB_texture_query_lod GL_ARB_texture_rgb10_a2ui GL_ARB_texture_storage GL_ARB_texture_swizzle GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_vertex_attrib_64bit GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_depth_bounds_test GL_EXT_texture_compression_s3tc GL_EXT_texture_filter_anisotropic GL_EXT_texture_mirror_clamp GL_EXT_texture_sRGB_decode GL_APPLE_client_storage GL_APPLE_container_object_shareable GL_APPLE_flush_render GL_APPLE_object_purgeable GL_APPLE_rgb_422 GL_APPLE_row_bytes GL_APPLE_texture_range GL_ATI_texture_mirror_once GL_NV_texture_barrier WebGL 1 Extensions: ANGLE_instanced_arrays EXT_blend_minmax EXT_color_buffer_half_float EXT_frag_depth EXT_sRGB EXT_shader_texture_lod EXT_texture_filter_anisotropic EXT_disjoint_timer_query OES_element_index_uint OES_standard_derivatives OES_texture_float OES_texture_float_linear OES_texture_half_float OES_texture_half_float_linear OES_vertex_array_object WEBGL_color_buffer_float WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_depth_texture WEBGL_draw_buffers WEBGL_lose_context WebGL 2 Driver WSI Info: CGL WebGL 2 Driver Renderer: ATI Technologies Inc. -- AMD Radeon R9 M395 OpenGL Engine WebGL 2 Driver Version: 4.1 ATI-1.51.8 WebGL 2 Driver Extensions: GL_ARB_blend_func_extended GL_ARB_draw_buffers_blend GL_ARB_draw_indirect GL_ARB_ES2_compatibility GL_ARB_explicit_attrib_location GL_ARB_gpu_shader_fp64 GL_ARB_gpu_shader5 GL_ARB_instanced_arrays GL_ARB_internalformat_query GL_ARB_occlusion_query2 GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_shader_subroutine GL_ARB_shading_language_include GL_ARB_tessellation_shader GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_cube_map_array GL_ARB_texture_gather GL_ARB_texture_query_lod GL_ARB_texture_rgb10_a2ui GL_ARB_texture_storage GL_ARB_texture_swizzle GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_vertex_attrib_64bit GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_depth_bounds_test GL_EXT_texture_compression_s3tc GL_EXT_texture_filter_anisotropic GL_EXT_texture_mirror_clamp GL_EXT_texture_sRGB_decode GL_APPLE_client_storage GL_APPLE_container_object_shareable GL_APPLE_flush_render GL_APPLE_object_purgeable GL_APPLE_rgb_422 GL_APPLE_row_bytes GL_APPLE_texture_range GL_ATI_texture_mirror_once GL_NV_texture_barrier WebGL 2 Extensions: EXT_color_buffer_float EXT_texture_filter_anisotropic EXT_disjoint_timer_query OES_texture_float_linear WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_lose_context GPU #1 Active: Yes Vendor ID: 0x1002 Device ID: 0x6920 Diagnostics AzureCanvasAccelerated: 1 AzureCanvasBackend: skia AzureContentBackend: skia AzureFallbackCanvasBackend: none TileHeight: 1024 TileWidth: 1024 Decision Log WEBRENDER: opt-in by default: WebRender is an opt-in feature Media ----- Audio Backend: audiounit Max Channels: 2 Preferred Channel Layout: stereo Preferred Sample Rate: 44100 Output Devices Name: Group Logitech USB Headset H540: AppleUSBAudioEngine:Logitech Inc :Logitech USB Headset H540:00000000:2 Headphones: AppleHDAEngineOutput:1F,3,0,1,2:0 Input Devices Name: Group Logitech USB Headset H540: AppleUSBAudioEngine:Logitech Inc :Logitech USB Headset H540:00000000:1 Internal Microphone: AppleHDAEngineInput:1F,3,0,1,0:1 Important Modified Preferences ------------------------------ browser.cache.disk.capacity: 358400 browser.cache.disk.filesystem_reported: 1 browser.cache.disk.smart_size.first_run: false browser.cache.frecency_experiment: 2 browser.places.smartBookmarksVersion: 8 browser.startup.homepage_override.buildID: 20170929100122 browser.startup.homepage_override.mstone: 58.0a1 browser.urlbar.lastSuggestionsPromptDate: 20171002 browser.urlbar.timesBeforeHidingSuggestionsHint: 2 dom.forms.autocomplete.formautofill: true extensions.lastAppVersion: 58.0a1 media.gmp-gmpopenh264.abi: x86_64-gcc3 media.gmp-gmpopenh264.lastUpdate: 1506963928 media.gmp-gmpopenh264.version: 1.6 media.gmp-manager.buildID: 20170929100122 media.gmp-manager.lastCheck: 1506963928 media.gmp-widevinecdm.abi: x86_64-gcc3 media.gmp-widevinecdm.lastUpdate: 1506963929 media.gmp-widevinecdm.version: 1.4.8.1008 media.gmp.storage.version.observed: 1 network.cookie.prefsMigrated: true network.predictor.cleaned-up: true places.history.expiration.transient_current_max_pages: 104858 plugin.disable_full_page_plugin_for_types: application/pdf security.sandbox.content.tempDirSuffix: {302ef223-65bf-814d-b07a-ef5f4cbfd823} services.sync.engine.addresses.available: true Important Locked Preferences ---------------------------- Places Database --------------- JavaScript ---------- Incremental GC: true Accessibility ------------- Activated: false Prevent Accessibility: 0 Library Versions ---------------- NSPR Expected minimum version: 4.17 Version in use: 4.17 NSS Expected minimum version: 3.33 Version in use: 3.33 NSSSMIME Expected minimum version: 3.33 Version in use: 3.33 NSSSSL Expected minimum version: 3.33 Version in use: 3.33 NSSUTIL Expected minimum version: 3.33 Version in use: 3.33 Experimental Features --------------------- Sandbox ------- Content Process Sandbox Level: 3 Effective Content Process Sandbox Level: 3

All tested on clean profile. 27" iMac 5K, fulscreen, www.csfd.cz

I'm sorry for additional spaming, but I have probably important discovery. If I disable e10s, the issue is gone. If I re-enable e10s again, the issue is back. It is somehow related to enabled e10s.

Hi, Michal, First, thanks your detail reply! Could you help me to provide the log from "about:networking" [1] with the log module "MediaDecoder:5,MediaFormatReader:5"? In addition, what's your screen resolution? Could the issue be reproduced when you decrease your screen resolution? Thank for your help! [1] https://developer.mozilla.org/en-US/docs/Mozilla/Debugging/HTTP_logging

Media playback pipeline won't change its behavior when in fullscreen. According to the profiles in comment 0, it seems compositor spent a significant portion of running time uploading textures. Could this be the cause of poor performance?

(In reply to Alastor Wu [:alwu][please needinfo me][GMT+8] from comment #10) > Hi, Michal, > > First, thanks your detail reply! > > Could you help me to provide the log from "about:networking" [1] with the > log module "MediaDecoder:5,MediaFormatReader:5"? > In addition, what's your screen resolution? Could the issue be reproduced > when you decrease your screen resolution? > Thank for your help! > > [1] https://developer.mozilla.org/en-US/docs/Mozilla/Debugging/HTTP_logging I tried to make logging based on posted manual, but result file is always empty. Either logging doesn`t work or there is another problem. My screen resolution is 5K (27-inch (5120 x 2880)). If I exit fullscreen, the problem is gone and video works well.

(In reply to John Lin [:jolin][:jhlin] from comment #11) > Media playback pipeline won't change its behavior when in fullscreen. > > According to the profiles in comment 0, it seems compositor spent a > significant portion of running time uploading textures. Could this be the > cause of poor performance? I have the same feeling as you, that it is somehow connected with huge amount of pixels of fullscreen in comparison of normal window of video.

There are a lot of painting times at content side in full screen mode with https://www.csfd.cz/ . It draws the subtitle and progress-bar for every frame. Here is my test code to dump the content into png file. https://github.com/JerryShih/gecko-dev/tree/5k-video-jank-bug-1383292

Per comment11, change component to graphic.

With e10s we have an extra copy. 5k screen, lots of pixels to copy. Need bug 1265824 fixed and this probably goes away.

Hi Michal, Before the bug 1265824 fixed, could you please turn off the preference "layers.single-tile.enabled" in about:config and try again? The video progress bar in https://www.csfd.cz/ doesn't go through the optimal render path.

(In reply to Jerry Shih[:jerry] (UTC+8) from comment #20) > Hi Michal, > > Before the bug 1265824 fixed, could you please turn off the preference > "layers.single-tile.enabled" in about:config and try again? > > The video progress bar in https://www.csfd.cz/ doesn't go through the > optimal render path. Hello Jerry, YES. It helped. If I set the preference "layers.single-tile.enabled" to "false" in about:config, videos on https://www.csfd.cz/ play like a charm, avg. 58 FPS, no tearing, maximal smoothness. Thank you for the solution.

Hi Michal, I think you can turn on the "layers.single-tile.enabled" again in nightly build. Bug 1431028 has in nightly. Thanks.

(In reply to Jerry Shih[:jerry] (UTC+8) (inactive) from comment #23) > Hi Michal, > > I think you can turn on the "layers.single-tile.enabled" again in nightly > build. > Bug 1431028 has in nightly. > Thanks. Hello Jerry, I did it. I reset "layers.single-tile.enabled" to default value, which is "true" and playing of videos on https://www.csfd.cz/ is much better. Avg. FPS is between 55 - 57 FPS. There are only sometime small stutterings, but generally the problem is resolved. Thank you very much for your efforts.

Wow~ We could close this bug now.

(In reply to Jerry Shih[:jerry] (UTC+8) (inactive) from comment #25) > Wow~ > We could close this bug now. Hello, yes I think so. Should BUG 1265824 solve intermittent micro-stutterings? Anyway many thanks for the solution.

Yes, the bug 1265824 should also improve the texture uploading performance. But I will not do the remaining work for bug 1265824 in the short term.

(In reply to Jerry Shih[:jerry] (UTC+8) (inactive) from comment #27) > Yes, the bug 1265824 should also improve the texture uploading performance. > But I will not do the remaining work for bug 1265824 in the short term. Ok. Thank you. You can close this bug.