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

Delta	Revision Range	Bot	Test Suite	Test
458.1%	551020-551093	android-nexus6	blink_perf.layout	fixed-grid-lots-of-stretched-data
451.4%	551057-551136	android-nexus5	blink_perf.layout	fixed-grid-lots-of-stretched-data
420.3%	551057-551136	android-nexus5	blink_perf.layout	fixed-grid-lots-of-data
399.5%	551020-551093	android-nexus6	blink_perf.layout	fixed-grid-lots-of-data
391.2%	551047-551129	android-nexus7v2	blink_perf.layout	fixed-grid-lots-of-stretched-data
378.0%	551047-551129	android-nexus7v2	blink_perf.layout	fixed-grid-lots-of-data
244.4%	551020-551093	android-nexus6	blink_perf.layout	auto-grid-lots-of-data
242.2%	550969-551101	chromium-rel-win8-dual	blink_perf.layout	fixed-grid-lots-of-data
237.4%	551056-551185	chromium-rel-win7-x64-dual	blink_perf.layout	fixed-grid-lots-of-data
235.4%	551057-551136	android-nexus5	blink_perf.layout	auto-grid-lots-of-data

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

Delta	Revision Range	Bot	Test Suite	Test	Bug
7479.9%	551468-551555	android-nexus5	thread_times.key_silk_cases	thread_other_cpu_time_per_frame/https___www.google.com_search?hl_en_q_define%3Aboogie	NONE
1946.2%	550227-550290	android-webview-nexus5X	system_health.memory_mobile	memory:webview:all_processes:reported_by_chrome:skia:effective_size_avg/browse_media/browse_media_youtube	833288
1171.1%	551053-551174	chromium-rel-mac12	system_health.memory_desktop	memory:chrome:all_processes:reported_by_chrome:skia:effective_size_avg/browse_media/browse_media_tumblr	834837
1058.8%	551468-551555	android-nexus5	thread_times.key_silk_cases	thread_total_all_cpu_time_per_frame/https___www.google.com_search?hl_en_q_define%3Aboogie	NONE
828.8%	551468-551555	android-nexus5	thread_times.key_silk_cases	thread_browser_cpu_time_per_frame/https___www.google.com_search?hl_en_q_define%3Aboogie	NONE
814.5%	551468-551555	android-nexus5	thread_times.key_silk_cases	thread_IO_cpu_time_per_frame/https___www.google.com_search?hl_en_q_define%3Aboogie	NONE
724.3%	551111-551207	chromium-rel-win10	system_health.memory_desktop	memory:chrome:all_processes:reported_by_chrome:skia:effective_size_avg/browse_media/browse_media_tumblr	834837
697.8%	551468-551555	android-nexus5	thread_times.key_silk_cases	thread_renderer_main_cpu_time_per_frame/https___www.google.com_search?hl_en_q_define%3Aboogie	NONE
510.5%	551468-551555	android-nexus5	thread_times.key_silk_cases	thread_total_fast_path_cpu_time_per_frame/https___www.google.com_search?hl_en_q_define%3Aboogie	NONE
462.3%	551152-551242	chromium-rel-win7-gpu-nvidia	system_health.memory_desktop	memory:chrome:all_processes:reported_by_chrome:skia:effective_size_avg/browse_media/browse_media_tumblr	NONE