| errors | Package errors implements functions to manipulate errors. |
| go.opencensus.io/internal/tagencoding | Package tagencoding contains the tag encoding used interally by the stats collector. |
| go.opencensus.io/metric/metricdata | Package metricdata contains the metrics data model. |
| math | Package math provides basic constants and mathematical functions. |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| sync/atomic | Package atomic provides low-level atomic memory primitives useful for implementing synchronization algorithms. |
| time | Package time provides functionality for measuring and displaying time. |