Top 10 improvements in the last 7 days for Chromium Perf Sheriff

Delta	Revision Range	Bot	Test Suite	Test
281.8%	568510-568598	linux-perf	smoothness.top_25_smooth	percentage_smooth/yahoo_sports
100.0%	565407-565508	android-nexus5X	smoothness.tough_scrolling_cases	mean_pixels_approximated/text_hover_20000_pixels_per_second
100.0%	565420-566179	android-nexus5	smoothness.tough_scrolling_cases	mean_pixels_approximated/text_hover_20000_pixels_per_second
93.4%	568953-569071	android-webview-nexus6	thread_times.simple_mobile_sites	thread_IO_cpu_time_per_frame/flickr_scroll
76.7%	568953-569071	android-webview-nexus6	system_health.memory_mobile	memory:webview:all_processes:reported_by_os:system_memory:java_heap:proportional_resident_size_avg/background_news/background_news_nytimes
72.1%	568953-569071	android-webview-nexus6	smoothness.tough_canvas_cases	frame_times/microsoft_video_city
65.8%	568953-569071	android-webview-nexus6	thread_times.simple_mobile_sites	thread_other_cpu_time_per_frame/flickr_scroll
65.5%	562467-568711	android-one	memory.top_10_mobile	memory:chrome:all_processes:reported_by_chrome:cc:effective_size_avg/foreground/http_www_amazon_com_gp_aw_s_k_nexus
62.2%	568953-569071	android-webview-nexus6	thread_times.simple_mobile_sites	thread_total_all_cpu_time_per_frame/flickr_scroll
61.7%	568953-569071	android-webview-nexus6	thread_times.simple_mobile_sites	thread_browser_cpu_time_per_frame/flickr_scroll

Top 10 regressions in the last 7 days for Chromium Perf Sheriff

Delta	Revision Range	Bot	Test Suite	Test	Bug
zero-to-nonzero	1521790214-1529078898	health-plan-webview-phone	system_health.memory_mobile	memory:webview:all_processes:reported_by_chrome:gpu:effective_size_avg/background_social/background_social_facebook	NONE
204800.0%	568608-568703	android-nexus5	system_health.memory_mobile	memory:chrome:all_processes:reported_by_chrome:gpu:effective_size_avg/background_search/background_search_google	NONE
204800.0%	1529470636-1529482382	health-plan-clankium-phone	system_health.memory_mobile	memory:chrome:all_processes:reported_by_chrome:gpu:effective_size_avg/background_media/background_media_imgur	NONE
204800.0%	1529470636-1529482382	health-plan-clankium-phone	system_health.memory_mobile	memory:chrome:all_processes:reported_by_chrome:gpu:effective_size_avg/background_search/background_search_google	NONE
102400.0%	568534-568615	android-webview-nexus6	system_health.memory_mobile	memory:webview:all_processes:reported_by_chrome:gpu:effective_size_avg/background_media/background_media_imgur	NONE
102400.0%	568534-568615	android-webview-nexus6	system_health.memory_mobile	memory:webview:all_processes:reported_by_chrome:gpu:effective_size_avg/background_search/background_search_google	NONE
102400.0%	568538-568621	android-webview-nexus5X	system_health.memory_mobile	memory:webview:all_processes:reported_by_chrome:gpu:effective_size_avg/background_search/background_search_google	NONE
102400.0%	568538-568621	android-webview-nexus5X	system_health.memory_mobile	memory:webview:all_processes:reported_by_chrome:gpu:effective_size_avg/background_media/background_media_imgur	NONE
102400.0%	1529499853-1529509462	health-plan-webview-phone	system_health.memory_mobile	memory:webview:all_processes:reported_by_chrome:gpu:effective_size_avg/background_search/background_search_google	NONE
102400.0%	1529463543-1529472549	health-plan-webview-phone	system_health.memory_mobile	memory:webview:all_processes:reported_by_chrome:gpu:effective_size_avg/background_media/background_media_imgur	NONE