• Provide the sw3 new agent core, for much better performance and adaptation. #236
• Support trace ignore and sample. Ignore html static pages and resources by default. #218
• Use new collector modularization architecture.
• Support collector cluster with zookeeper, replaced akka component.
• New features about collecting JVM info, service metrics, and service dependency tree.
• Use gRPC as default uplinking protocol, Support trace compression. #236
• Collector keeps supporting HTTP services for collecting data from other language agents (Someone did in PHP and Golang) with some adjustments.
• Support Application instance discovery. #267

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