Go 1.14 defer benchmark

defer_test.go

package bigcache

import "testing"

var sink = 0

func BenchmarkNotDefered(b *testing.B) {
        for n := 0; n < b.N; n++ {
                notDefered()
        }
	b.Log(sink)
}

func BenchmarkDefered(b *testing.B) {
        for n := 0; n < b.N; n++ {
                defered()
        }
	b.Log(sink)
}

func defered() {
    defer func() {
	    sink++
    }()
}

func notDefered() {
    func() {
	    sink++
    }()
}

go tool objdump -s defered bigcache.1.13.test

TEXT command-line-arguments.defered(SB) /go/src/github.com/janisz/presentations/bigcache/defer_test.go
  defer_test.go:21	0x4f65f0		64488b0c25f8ffffff	MOVQ FS:0xfffffff8, CX			
  defer_test.go:21	0x4f65f9		483b6110		CMPQ 0x10(CX), SP			
  defer_test.go:21	0x4f65fd		7654			JBE 0x4f6653				
  defer_test.go:21	0x4f65ff		4883ec48		SUBQ $0x48, SP				
  defer_test.go:21	0x4f6603		48896c2440		MOVQ BP, 0x40(SP)			
  defer_test.go:21	0x4f6608		488d6c2440		LEAQ 0x40(SP), BP			
  defer_test.go:22	0x4f660d		c744240800000000	MOVL $0x0, 0x8(SP)			
  defer_test.go:22	0x4f6615		488d05dc7c0500		LEAQ 0x57cdc(IP), AX			
  defer_test.go:22	0x4f661c		4889442420		MOVQ AX, 0x20(SP)			
  defer_test.go:22	0x4f6621		488d442408		LEAQ 0x8(SP), AX			
  defer_test.go:22	0x4f6626		48890424		MOVQ AX, 0(SP)				
  defer_test.go:22	0x4f662a		e8b152f3ff		CALL runtime.deferprocStack(SB)		
  defer_test.go:22	0x4f662f		85c0			TESTL AX, AX				
  defer_test.go:22	0x4f6631		7510			JNE 0x4f6643				
  defer_test.go:25	0x4f6633		90			NOPL					
  defer_test.go:25	0x4f6634		e8c75af3ff		CALL runtime.deferreturn(SB)		
  defer_test.go:25	0x4f6639		488b6c2440		MOVQ 0x40(SP), BP			
  defer_test.go:25	0x4f663e		4883c448		ADDQ $0x48, SP				
  defer_test.go:25	0x4f6642		c3			RET					
  defer_test.go:22	0x4f6643		90			NOPL					
  defer_test.go:22	0x4f6644		e8b75af3ff		CALL runtime.deferreturn(SB)		
  defer_test.go:22	0x4f6649		488b6c2440		MOVQ 0x40(SP), BP			
  defer_test.go:22	0x4f664e		4883c448		ADDQ $0x48, SP				
  defer_test.go:22	0x4f6652		c3			RET					
  defer_test.go:21	0x4f6653		e83818f6ff		CALL runtime.morestack_noctxt(SB)	
  defer_test.go:21	0x4f6658		eb96			JMP command-line-arguments.defered(SB)	

TEXT command-line-arguments.defered.func1(SB) /go/src/github.com/janisz/presentations/bigcache/defer_test.go
  defer_test.go:23	0x4f6670		48ff0501a91500		INCQ command-line-arguments.sink(SB)	
  defer_test.go:24	0x4f6677		c3			RET		

go tool objdump -s defered bigcache.1.14.test

TEXT command-line-arguments.defered(SB) /go/src/github.com/janisz/presentations/bigcache/defer_test.go
  defer_test.go:21	0x4f9820		64488b0c25f8ffffff	MOVQ FS:0xfffffff8, CX				
  defer_test.go:21	0x4f9829		483b6110		CMPQ 0x10(CX), SP				
  defer_test.go:21	0x4f982d		764e			JBE 0x4f987d					
  defer_test.go:21	0x4f982f		4883ec18		SUBQ $0x18, SP					
  defer_test.go:21	0x4f9833		48896c2410		MOVQ BP, 0x10(SP)				
  defer_test.go:21	0x4f9838		488d6c2410		LEAQ 0x10(SP), BP				
  defer_test.go:21	0x4f983d		48c7c000000000		MOVQ $0x0, AX					
  defer_test.go:21	0x4f9844		4889442408		MOVQ AX, 0x8(SP)				
  defer_test.go:21	0x4f9849		c644240700		MOVB $0x0, 0x7(SP)				
  defer_test.go:22	0x4f984e		488d0503e80400		LEAQ 0x4e803(IP), AX				
  defer_test.go:22	0x4f9855		4889442408		MOVQ AX, 0x8(SP)				
  defer_test.go:25	0x4f985a		c644240700		MOVB $0x0, 0x7(SP)				
  defer_test.go:25	0x4f985f		e83c000000		CALL command-line-arguments.defered.func1(SB)	
  defer_test.go:25	0x4f9864		488b6c2410		MOVQ 0x10(SP), BP				
  defer_test.go:25	0x4f9869		4883c418		ADDQ $0x18, SP					
  defer_test.go:25	0x4f986d		c3			RET						
  defer_test.go:25	0x4f986e		e81d70f3ff		CALL runtime.deferreturn(SB)			
  defer_test.go:25	0x4f9873		488b6c2410		MOVQ 0x10(SP), BP				
  defer_test.go:25	0x4f9878		4883c418		ADDQ $0x18, SP					
  defer_test.go:25	0x4f987c		c3			RET						
  defer_test.go:21	0x4f987d		e8be5cf6ff		CALL runtime.morestack_noctxt(SB)		
  defer_test.go:21	0x4f9882		eb9c			JMP command-line-arguments.defered(SB)		

TEXT command-line-arguments.defered.func1(SB) /go/src/github.com/janisz/presentations/bigcache/defer_test.go
  defer_test.go:23	0x4f98a0		48ff05b1681600		INCQ command-line-arguments.sink(SB)	
  defer_test.go:24	0x4f98a7		c3			RET	

results

benchstat go_version_go1.13.6_linux_amd64.txt go_version_go1.14beta1_linux_amd64.txt 
name          old time/op    new time/op    delta
NotDefered      1.31ns ± 4%    1.39ns ± 9%   +5.40%  (p=0.005 n=10+10)
NotDefered-2    1.28ns ± 0%    1.36ns ± 6%   +6.09%  (p=0.000 n=7+10)
NotDefered-3    1.28ns ± 0%    1.42ns ± 2%  +10.64%  (p=0.000 n=8+8)
NotDefered-4    1.28ns ± 0%    1.35ns ± 5%   +5.63%  (p=0.000 n=6+10)
Defered         32.0ns ± 2%     2.7ns ± 1%  -91.66%  (p=0.000 n=10+10)
Defered-2       31.6ns ± 0%     2.7ns ± 3%  -91.39%  (p=0.000 n=10+10)
Defered-3       31.6ns ± 0%     2.7ns ± 1%  -91.56%  (p=0.000 n=10+8)
Defered-4       31.5ns ± 0%     2.7ns ± 0%  -91.51%  (p=0.000 n=9+8)