perf: reduce 90% of RedisResult memory allocation while delegating to RedisMessage

[rueian]

This PR actually removes almost all RedisResult memory allocation while delegating to RedisMessage. The previous memory allocation behavior can be considered a bug.

Given the following benchmark:

func BenchmarkRueidisToString(b *testing.B) {
	client, err := rueidis.NewClient(rueidis.ClientOption{InitAddress: []string{"127.0.0.1:6379"}})
	if err != nil {
		panic(err)
	}
	defer client.Close()
	b.ReportAllocs()
	b.ResetTimer()
	b.RunParallel(func(pb *testing.PB) {
		for pb.Next() {
			_, _ = client.Do(context.Background(), client.B().Get().Key("Key").Build()).ToString()
		}
	})
	b.StopTimer()
}

The old result is:

goos: darwin
goarch: arm64
BenchmarkRueidisToString
BenchmarkRueidisToString-10    	  385492	      3397 ns/op	     163 B/op	       2 allocs/op
PASS

The new result will be:

goos: darwin
goarch: arm64
BenchmarkRueidisToString
BenchmarkRueidisToString-10    	  386966	      3087 ns/op	       3 B/op	       0 allocs/op
PASS

[codecov]

Codecov Report

Base: 96.19% // Head: 96.18% // Decreases project coverage by -0.00% ⚠️

Coverage data is based on head (b39f995) compared to base (0758427).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #160      +/-   ##
==========================================
- Coverage   96.19%   96.18%   -0.01%     
==========================================
  Files          36       36              
  Lines       25333    25382      +49     
==========================================
+ Hits        24368    24414      +46     
- Misses        845      847       +2     
- Partials      120      121       +1     

Impacted Files	Coverage Δ
message.go	100.00% <100.00%> (ø)
rueidislock/lock.go	99.53% <0.00%> (-0.47%)	⬇️
pipe.go	99.74% <0.00%> (-0.26%)	⬇️

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[rueian]

Hi @FZambia,

It is never-ending work, but you probably will like this one: it reduces allocations.

[FZambia]

Oh no, re-measure everything 😿 This is an amazing improvement, thanks!