Release the Go agent v3.15.0

[RichVanderwal]

3.15.0

Fixed

• Updated mongodb driver version to 1.5.1 to fix security issue in external dependency. Fixes Issue #358 and Issue #370.

• Updated the go.mod file in the nrgin integration to require version 1.7.0 of the github.com/gin-gonic/gin package. This addresses CVE-2020-28483 which documents a vulnerability in versions of github.com/gin-gonic/gin earlier than 1.7.0.

Added

• New integration nrpgx added to provide the same functionality for instrumenting Postgres database queries as the existing nrpq integration, but using the pgx driver instead. This only covers (at present) the use case of the pgx driver with the standard library database/sql. Fixes Issue #142 and Issue #292

Changed

• Enhanced debugging logs so that New Relic license keys are redacted from the log output. Fixes Issue #353.

• Updated the advice in GUIDE.md to have correct go get commands with explicit reference to v3.

Support Statement

New Relic recommends that you upgrade the agent regularly to ensure that you're getting the latest features and performance benefits. Additionally, older releases will no longer be supported when they reach end-of-life.

[RichVanderwal]

Benchmark for this release, from Rich's 16-inch 2019 MacBook Pro, using a brand-new Go 1.17:

goos: darwin
goarch: amd64
pkg: github.com/newrelic/go-agent/v3/newrelic
cpu: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
BenchmarkTxnEventsCollectorJSON-12              	     189	   6423867 ns/op	 7518752 B/op	   70844 allocs/op
BenchmarkCustomEventsCollectorJSON-12           	     320	   3856756 ns/op	 5435270 B/op	   41048 allocs/op
BenchmarkErrorEventsCollectorJSON-12            	     229	   5191395 ns/op	 6566562 B/op	   57094 allocs/op
BenchmarkAgentAttributes-12                     	  380491	      3170 ns/op	    4282 B/op	      41 allocs/op
BenchmarkPayloadText-12                         	  771411	      1588 ns/op	    1707 B/op	      24 allocs/op
BenchmarkAcceptW3C-12                           	  566199	      2178 ns/op	    2641 B/op	      35 allocs/op
BenchmarkErrorsJSON-12                          	   80907	     14876 ns/op	   30410 B/op	     142 allocs/op
BenchmarkMuxWithoutNewRelic-12                  	10733185	       101.8 ns/op	      91 B/op	       1 allocs/op
BenchmarkMuxWithNewRelic-12                     	  240526	      5458 ns/op	    6874 B/op	      68 allocs/op
BenchmarkTraceSegmentWithDefer-12               	 4283700	       282.0 ns/op	     212 B/op	       3 allocs/op
BenchmarkTraceSegmentNoDefer-12                 	 4411492	       278.4 ns/op	     212 B/op	       3 allocs/op
BenchmarkTraceSegmentZeroSegmentThreshold-12    	 3383460	       361.4 ns/op	     289 B/op	       4 allocs/op
BenchmarkDatastoreSegment-12                    	 1519242	       790.5 ns/op	     717 B/op	      13 allocs/op
BenchmarkExternalSegment-12                     	 1968438	       617.9 ns/op	     594 B/op	       7 allocs/op
BenchmarkTxnWithSegment-12                      	  553490	      2597 ns/op	    3392 B/op	      33 allocs/op
BenchmarkTxnWithDatastore-12                    	  309115	      3962 ns/op	    4946 B/op	      51 allocs/op
BenchmarkTxnWithExternal-12                     	  354644	      3534 ns/op	    4624 B/op	      42 allocs/op
BenchmarkBrowserTimingHeaderSuccess-12          	  437133	      2328 ns/op	    3049 B/op	      36 allocs/op
BenchmarkMetricTableCollectorJSON-12            	    1857	    685054 ns/op	  809841 B/op	    6776 allocs/op
BenchmarkAddingSameMetrics-12                   	17265639	        67.17 ns/op	      50 B/op	       0 allocs/op
BenchmarkServerless-12                          	    4113	    302197 ns/op	 1466431 B/op	    1891 allocs/op
BenchmarkWitnessNode-12                         	12969794	        80.10 ns/op	      58 B/op	       0 allocs/op
PASS
ok  	github.com/newrelic/go-agent/v3/newrelic	46.227s
PASS
ok  	github.com/newrelic/go-agent/v3/newrelic/sqlparse	4.126s