2 "_description" : "This file contains info about our performance test units, used by the perf dashboard (http://chromeperf.appspot.com).",
5 "improvement_direction": "down",
6 "why": "Percent CPU usage. Used by cpu metric."
9 "improvement_direction": "down",
13 "improvement_direction": "down",
17 "improvement_direction": "down"
20 "improvement_direction": "up"
23 "improvement_direction": "down",
24 "why": "Colder machines are faster."
27 "improvement_direction": "up",
28 "why": "layer_tree_host_perftest"
31 "improvement_direction": "down",
35 "improvement_direction": "up",
36 "why": "Decibels peak signal-to-noise ratio. Used by WebRTC quality tests."
39 "improvement_direction": "down",
40 "why": "Static initializers"
43 "improvement_direction": "up",
44 "why": "The faster the better. Used by scirra benchmark."
47 "improvement_direction": "down",
48 "why": "Dropped frames."
50 "frames-per-second": {
51 "improvement_direction": "up",
52 "why": "Synonym for fps."
55 "improvement_direction": "up",
56 "why": "layer_tree_host_perftest"
59 "improvement_direction": "down"
61 "garbage_collections": {
62 "improvement_direction": "down",
63 "why": "Number of GCs needed to collect an object. Less is better."
66 "improvement_direction": "up",
67 "why": "Higher frequencies are faster."
70 "improvement_direction": "down",
71 "why": "Fewer janks is better."
74 "improvement_direction": "down",
75 "why": "Synonym for KB, used in memory and io metrics."
78 "improvement_direction": "up",
79 "why": "kB of memory available. More memory available is better."
82 "improvement_direction": "down",
83 "why": "KB of memory usage. Less memory usage is better. Used in endure."
86 "improvement_direction": "up",
87 "why": "Coverage. More test coverage is better."
90 "improvement_direction": "down"
93 "improvement_direction": "down"
96 "improvement_direction": "up",
97 "why": "More instructions processed per time unit."
100 "improvement_direction": "up",
101 "why": "More pixels processed per time unit."
104 "improvement_direction": "up",
105 "why": "More texels processed per time unit."
108 "improvement_direction": "up",
109 "why": "More triangles processed per time unit."
112 "improvement_direction": "up",
113 "why": "More vertices processed per time unit."
116 "improvement_direction": "down",
117 "why": "Used in many Telemetry measurements. Fewer ms of time means faster."
119 "ms/1000 elements": {
120 "improvement_direction": "down"
123 "improvement_direction": "down",
124 "why": "Synonym for ms."
126 "milliseconds-per-frame": {
127 "improvement_direction": "down"
130 "improvement_direction": "down",
131 "why": "Used for NaCl build time."
134 "improvement_direction": "down",
135 "why": "Fewer milliwatt-hours means less energy consumed."
137 "objects (bigger is better)": {
138 "improvement_direction": "up",
139 "why": "Used in spaceport benchmark."
142 "improvement_direction": "up"
145 "improvement_direction": "down",
146 "why": "Synonym for %, used in memory metric for percent fragmentation."
149 "improvement_direction": "up",
150 "why": "Used in alloy-perf-test/cts%/passed."
153 "improvement_direction": "up",
154 "why": "Synonym for score, used in ChromeOS touchpad tests."
157 "improvement_direction": "down"
160 "improvement_direction": "up",
161 "why": "Used in draw_property measurement to indicate relative improvement."
164 "improvement_direction": "down"
167 "improvement_direction": "up",
168 "why": "Higher runs/ms implies faster execution."
171 "improvement_direction": "up",
172 "why": "Used in dromaeo. Higher runs/s implies faster execution."
175 "improvement_direction": "up",
176 "why": "Synonym for runs/s, used in dromaeo data sent by cros bots."
179 "improvement_direction": "up",
180 "why": "Synonym for runs/s."
183 "improvement_direction": "up",
184 "why": "Used in a variety of benchmarks where a higher score is better."
186 "score_(bigger_is_better)": {
187 "improvement_direction": "up",
188 "why": "Synonym for score."
190 "score (bigger is better)": {
191 "improvement_direction": "up",
192 "why": "Synonym for score, used in jsgamebench and dom_perf."
195 "improvement_direction": "down"
198 "improvement_direction": "down"
201 "improvement_direction": "down"
204 "improvement_direction": "up"
207 "improvement_direction": "down"
210 "improvement_direction": "down",
211 "why": "Used in smoothness benchmarks. Number of vsyncs to generate a frame, never < 1.0"
214 "improvement_direction": "up",
215 "why": "Percentage of work done in idle time."