MergeIterator benchmark: add more realistic sizes

At 15-second scrape intervals a chunk covers 30 minutes, so 1,000 chunks
is about three weeks, a highly un-representative test.

Instant queries, such as those done by the ruler, will only fetch one
chunk from each ingester.

Signed-off-by: Bryan Boreham <[email protected]>

Author: bboreham

pkg/querier/batch/batch_test.go

@@ -27,6 +27,10 @@ func BenchmarkNewChunkMergeIterator_CreateAndIterate(b *testing.B) {
 		{numChunks: 1000, numSamplesPerChunk: 100, duplicationFactor: 3, enc: promchunk.DoubleDelta},
 		{numChunks: 1000, numSamplesPerChunk: 100, duplicationFactor: 1, enc: promchunk.PrometheusXorChunk},
 		{numChunks: 1000, numSamplesPerChunk: 100, duplicationFactor: 3, enc: promchunk.PrometheusXorChunk},
+		{numChunks: 100, numSamplesPerChunk: 100, duplicationFactor: 1, enc: promchunk.PrometheusXorChunk},
+		{numChunks: 100, numSamplesPerChunk: 100, duplicationFactor: 3, enc: promchunk.PrometheusXorChunk},
+		{numChunks: 1, numSamplesPerChunk: 100, duplicationFactor: 1, enc: promchunk.PrometheusXorChunk},
+		{numChunks: 1, numSamplesPerChunk: 100, duplicationFactor: 3, enc: promchunk.PrometheusXorChunk},
 	}
 
 	for _, scenario := range scenarios {