some fixes to sonic and make it faster by reusing arrays.

BenchmarkParseMessage/relay/jsonstdlib-4              216   5651451 ns/op
BenchmarkParseMessage/relay/easyjson-4                313   3703457 ns/op
BenchmarkParseMessage/relay/simdjson-4                469   2606309 ns/op
BenchmarkParseMessage/relay/sonic-4                   966   1268594 ns/op

BenchmarkParseMessage/client/jsonstdlib-4             216   5524239 ns/op
BenchmarkParseMessage/client/easyjson-4               422   2756370 ns/op
BenchmarkParseMessage/client/simdjson-4               519   2298477 ns/op
BenchmarkParseMessage/client/sonic-4                  644   1860583 ns/op

envelopes_benchmark_test.go

@@ -42,9 +42,10 @@ func BenchmarkParseMessage(b *testing.B) {
 			})
 
 			b.Run("sonic", func(b *testing.B) {
+				smp := NewSonicMessageParser()
 				for i := 0; i < b.N; i++ {
 					for _, msg := range messages {
-						_, _ = ParseMessageSonic(msg)
+						_, _ = smp.ParseMessage(msg)
 					}
 				}
 			})
@@ -57,7 +58,7 @@ func generateTestMessages(typ string) [][]byte {
 
 	setup := map[string]map[int]func() []byte{
 		"client": {
-			500: generateEventMessage,
+			600: generateEventMessage,
 			5:   generateEOSEMessage,
 			9:   generateNoticeMessage,
 			14:  generateCountMessage,
@@ -65,6 +66,7 @@ func generateTestMessages(typ string) [][]byte {
 		},
 		"relay": {
 			500: generateReqMessage,
+			50:  generateEventMessage,
 			10:  generateCountMessage,
 		},
 	}[typ]