feat: Added delay and duration to profiling config (#3754)

Author: svetlanabrennan

lib/config/default.js

@@ -1275,6 +1275,20 @@ defaultConfig.definition = () => {
         formatter: array,
         default: ['cpu', 'heap']
       },
+      /**
+       * Delay in milliseconds before starting profiler.
+       */
+      delay: {
+        formatter: int,
+        default: 0
+      },
+      /**
+       * If >0, stop profiler after this many milliseconds of operation.
+       */
+      duration: {
+        formatter: int,
+        default: 0
+      },
       /**
        * Restart the cpu profiler every n milliseconds to report its data
        */

test/unit/config/config-defaults.test.js

@@ -348,6 +348,8 @@ test('with default properties', async (t) => {
 
   await t.test('profiling defaults', () => {
     assert.equal(configuration.profiling.enabled, false)
+    assert.equal(configuration.profiling.delay, 0)
+    assert.equal(configuration.profiling.duration, 0)
     assert.equal(configuration.profiling.sample_interval, 100)
     assert.deepEqual(configuration.profiling.include, ['cpu', 'heap'])
     assert.equal(configuration.profiling.cpu.report_interval, 0)

test/unit/config/config-env.test.js

@@ -483,13 +483,17 @@ test('when overriding configuration values via environment variables', async (t)
     const env = {
       NEW_RELIC_PROFILING_ENABLED: true,
       NEW_RELIC_PROFILING_INCLUDE: ['heap'],
+      NEW_RELIC_PROFILING_DELAY: 100,
+      NEW_RELIC_PROFILING_DURATION: 20000,
       NEW_RELIC_PROFILING_SAMPLE_INTERVAL: 150,
       NEW_RELIC_PROFILING_HEAP_REPORT_INTERVAL: 200
     }
 
     idempotentEnv(env, (tc) => {
       assert(tc.profiling.enabled, true)
       assert.deepStrictEqual(tc.profiling.include, ['heap'])
+      assert.equal(tc.profiling.delay, 100)
+      assert.equal(tc.profiling.duration, 20000)
       assert.equal(tc.profiling.sample_interval, 150)
       assert.equal(tc.profiling.heap.report_interval, 200)
       end()

test/unit/config/config.test.js

@@ -542,6 +542,8 @@ test('distributed tracing samplers', async (t) => {
     const config = {
       profiling: {
         enabled: true,
+        delay: 100,
+        duration: 20000,
         sample_interval: 200,
         include: ['cpu'],
         cpu: {
@@ -552,6 +554,8 @@ test('distributed tracing samplers', async (t) => {
 
     const configuration = Config.initialize(config)
     assert.equal(configuration.profiling.enabled, true)
+    assert.equal(configuration.profiling.delay, 100)
+    assert.equal(configuration.profiling.duration, 20000)
     assert.equal(configuration.profiling.sample_interval, 200)
     assert.deepEqual(configuration.profiling.include, ['cpu'])
     assert.equal(configuration.profiling.cpu.report_interval, 50)