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From: Liigo Zhuang <com.li...@gmail.com>Date: Fri, 30 Mar 2012 14:58:16 +0800
Local: Fri, Mar 30 2012 2:58 am
Subject: Go1 两行代码编译生成超大EXE
以下代码用到Go1标准库fmt和expvar，仅两行代码，结果编译生成的EXE超大，达 3.2 MB。我的系统是 Windows 7, x86。
按说，如果仅仅输出 fmt.Println("Hello world")，EXE应该在 1.1 MB 是比较正常的表现。
编译方法：
go build expvar.go
--------------------------------------------------------
package main
import (
"fmt"
"expvar"
)
func main() {
fmt.Println("Hello, Go1. This is liigo.")
expvar.Do(func(kv expvar.KeyValue){ fmt.Printf("\n%s=%s\n",kv.Key,kv.Value)
})
}
--------------------------------------------------------
--
by *Liigo*, http://blog.csdn.net/liigo/
Google+ https://plus.google.com/105597640837742873343/
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From: minux <minux...@gmail.com>Date: Fri, 30 Mar 2012 15:02:21 +0800
Local: Fri, Mar 30 2012 3:02 am
Subject: Re: [gocn:3433] Go1 两行代码编译生成超大EXE
2012/3/30 Liigo Zhuang <com.li...@gmail.com>
> 以下代码用到Go1标准库fmt和expvar，仅两行代码，结果编译生成的EXE超大，达 3.2 MB。我的系统是 Windows 7, x86。 > 按说，如果仅仅输出 fmt.Println("Hello world")，EXE应该在 1.1 MB 是比较正常的表现。 > 编译方法：
> go build expvar.go
> --------------------------------------------------------
> package main
> import (
> "fmt"
> "expvar"
> )
> func main() {
> fmt.Println("Hello, Go1. This is liigo.")
> expvar.Do(func(kv expvar.KeyValue){
> fmt.Printf("\n%s=%s\n",kv.Key,kv.Value) })
> }
$ go list -f {{.Deps}} expvar
[bufio bytes compress/flate compress/gzip crypto crypto/aes crypto/cipher
crypto/des crypto/dsa crypto/elliptic crypto/hmac crypto/md5 crypto/rand
crypto/rc4 crypto/rsa crypto/sha1 crypto/subtle crypto/tls crypto/x509
crypto/x509/pkix encoding/asn1 encoding/base64 encoding/binary
encoding/json encoding/pem errors fmt hash hash/crc32 io io/ioutil log math
math/big math/rand mime mime/multipart net net/http net/textproto net/url
os path path/filepath reflect runtime runtime/cgo runtime/debug sort
strconv strings sync sync/atomic syscall time unicode unicode/utf16
unicode/utf8 unsafe]
看看fmt引用了啥：
$ go list -f {{.Deps}} fmt
[errors io math os reflect runtime strconv sync sync/atomic syscall time
unicode/utf8 unsafe]
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From: Liigo Zhuang <com.li...@gmail.com>Date: Fri, 30 Mar 2012 15:24:09 +0800
Local: Fri, Mar 30 2012 3:24 am
Subject: Re: [gocn:3434] Go1 两行代码编译生成超大EXE
哦，明白了。想不到啊。
在 2012年3月30日 下午3:02，minux <minux...@gmail.com>写道：
> 2012/3/30 Liigo Zhuang <com.li...@gmail.com>
>> 以下代码用到Go1标准库fmt和expvar，仅两行代码，结果编译生成的EXE超大，达 3.2 MB。我的系统是 Windows 7, x86。
>> 按说，如果仅仅输出 fmt.Println("Hello world")，EXE应该在 1.1 MB 是比较正常的表现。
>> 编译方法：
>> go build expvar.go
>> --------------------------------------------------------
>> package main
>> import (
>> "fmt"
>> "expvar"
>> )
>> func main() {
>> fmt.Println("Hello, Go1. This is liigo.")
>> expvar.Do(func(kv expvar.KeyValue){
>> fmt.Printf("\n%s=%s\n",kv.Key,kv.Value) })
>> }
> 问题是你用了expvar，于是你间接引用了超级多的包。
> $ go list -f {{.Deps}} expvar
> [bufio bytes compress/flate compress/gzip crypto crypto/aes crypto/cipher
> crypto/des crypto/dsa crypto/elliptic crypto/hmac crypto/md5 crypto/rand
> crypto/rc4 crypto/rsa crypto/sha1 crypto/subtle crypto/tls crypto/x509
> crypto/x509/pkix encoding/asn1 encoding/base64 encoding/binary
> encoding/json encoding/pem errors fmt hash hash/crc32 io io/ioutil log math
> math/big math/rand mime mime/multipart net net/http net/textproto net/url
> os path path/filepath reflect runtime runtime/cgo runtime/debug sort
> strconv strings sync sync/atomic syscall time unicode unicode/utf16
> unicode/utf8 unsafe]
> 看看fmt引用了啥：
> $ go list -f {{.Deps}} fmt
> [errors io math os reflect runtime strconv sync sync/atomic syscall time
> unicode/utf8 unsafe]
> --
> 来自: Golang-China ~ 中文Go语言技术邮件列表
> 详情: http://groups.google.com/group/golang-china
> 官网: http://golang-china.org/
> IRC: irc.freenode.net #golang-china
> @golangchina
by *Liigo*, http://blog.csdn.net/liigo/
Google+ https://plus.google.com/105597640837742873343/
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From: "Andy W. Song" <wson...@gmail.com>Date: Fri, 30 Mar 2012 15:37:41 +0800
Local: Fri, Mar 30 2012 3:37 am
Subject: Re: [gocn:3435] Go1 两行代码编译生成超大EXE
话说这个expvar到底是做嘛用的？
2012/3/30 Liigo Zhuang <com.li...@gmail.com>
> 哦，明白了。想不到啊。 > 在 2012年3月30日 下午3:02，minux <minux...@gmail.com>写道：
>> 2012/3/30 Liigo Zhuang <com.li...@gmail.com>
>>> 以下代码用到Go1标准库fmt和expvar，仅两行代码，结果编译生成的EXE超大，达 3.2 MB。我的系统是 Windows 7, x86。
>>> 按说，如果仅仅输出 fmt.Println("Hello world")，EXE应该在 1.1 MB 是比较正常的表现。
>>> 编译方法：
>>> go build expvar.go
>>> --------------------------------------------------------
>>> package main
>>> import (
>>> "fmt"
>>> "expvar"
>>> )
>>> func main() {
>>> fmt.Println("Hello, Go1. This is liigo.")
>>> expvar.Do(func(kv expvar.KeyValue){
>>> fmt.Printf("\n%s=%s\n",kv.Key,kv.Value) })
>>> }
>> 问题是你用了expvar，于是你间接引用了超级多的包。
>> $ go list -f {{.Deps}} expvar
>> [bufio bytes compress/flate compress/gzip crypto crypto/aes crypto/cipher
>> crypto/des crypto/dsa crypto/elliptic crypto/hmac crypto/md5 crypto/rand
>> crypto/rc4 crypto/rsa crypto/sha1 crypto/subtle crypto/tls crypto/x509
>> crypto/x509/pkix encoding/asn1 encoding/base64 encoding/binary
>> encoding/json encoding/pem errors fmt hash hash/crc32 io io/ioutil log math
>> math/big math/rand mime mime/multipart net net/http net/textproto net/url
>> os path path/filepath reflect runtime runtime/cgo runtime/debug sort
>> strconv strings sync sync/atomic syscall time unicode unicode/utf16
>> unicode/utf8 unsafe]
>> 看看fmt引用了啥：
>> $ go list -f {{.Deps}} fmt
>> [errors io math os reflect runtime strconv sync sync/atomic syscall time
>> unicode/utf8 unsafe]
>> --
>> 来自: Golang-China ~ 中文Go语言技术邮件列表
>> 详情: http://groups.google.com/group/golang-china
>> 官网: http://golang-china.org/
>> IRC: irc.freenode.net #golang-china
>> @golangchina
> --
> by *Liigo*, http://blog.csdn.net/liigo/
> Google+ https://plus.google.com/105597640837742873343/
> --
> 来自: Golang-China ~ 中文Go语言技术邮件列表
> 详情: http://groups.google.com/group/golang-china
> 官网: http://golang-china.org/
> IRC: irc.freenode.net #golang-china
> @golangchina
---------------------------------------------------------------
有志者，事竟成，破釜沉舟，百二秦关终属楚
苦心人，天不负，卧薪尝胆，三千越甲可吞吴
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From: fango <fan.how...@gmail.com>Date: Fri, 30 Mar 2012 16:13:11 +0800
Local: Fri, Mar 30 2012 4:13 am
Subject: Re: [gocn:3436] Go1 两行代码编译生成超大EXE
应该是Export Variables的缩写。举例是运行godoc，然后 http://localhost:6060/debug/vars。
fango
On Fri, Mar 30, 2012 at 3:37 PM, Andy W. Song <wson...@gmail.com> wrote:
> 话说这个expvar到底是做嘛用的？ > 2012/3/30 Liigo Zhuang <com.li...@gmail.com>
>> 哦，明白了。想不到啊。
>> 在 2012年3月30日 下午3:02，minux <minux...@gmail.com>写道：
>>> 2012/3/30 Liigo Zhuang <com.li...@gmail.com>
>>>> 以下代码用到Go1标准库fmt和expvar，仅两行代码，结果编译生成的EXE超大，达 3.2 MB。我的系统是 Windows 7, x86。
>>>> 按说，如果仅仅输出 fmt.Println("Hello world")，EXE应该在 1.1 MB 是比较正常的表现。
>>>> 编译方法：
>>>> go build expvar.go
>>>> --------------------------------------------------------
>>>> package main
>>>> import (
>>>> "fmt"
>>>> "expvar"
>>>> )
>>>> func main() {
>>>> fmt.Println("Hello, Go1. This is liigo.")
>>>> expvar.Do(func(kv expvar.KeyValue){
>>>> fmt.Printf("\n%s=%s\n",kv.Key,kv.Value) })
>>>> }
>>> 问题是你用了expvar，于是你间接引用了超级多的包。
>>> $ go list -f {{.Deps}} expvar
>>> [bufio bytes compress/flate compress/gzip crypto crypto/aes crypto/cipher
>>> crypto/des crypto/dsa crypto/elliptic crypto/hmac crypto/md5 crypto/rand
>>> crypto/rc4 crypto/rsa crypto/sha1 crypto/subtle crypto/tls crypto/x509
>>> crypto/x509/pkix encoding/asn1 encoding/base64 encoding/binary encoding/json
>>> encoding/pem errors fmt hash hash/crc32 io io/ioutil log math math/big
>>> math/rand mime mime/multipart net net/http net/textproto net/url os path
>>> path/filepath reflect runtime runtime/cgo runtime/debug sort strconv strings
>>> sync sync/atomic syscall time unicode unicode/utf16 unicode/utf8 unsafe]
>>> 看看fmt引用了啥：
>>> $ go list -f {{.Deps}} fmt
>>> [errors io math os reflect runtime strconv sync sync/atomic syscall time
>>> unicode/utf8 unsafe]
>>> --
>>> 来自: Golang-China ~ 中文Go语言技术邮件列表
>>> 详情: http://groups.google.com/group/golang-china
>>> 官网: http://golang-china.org/
>>> IRC: irc.freenode.net #golang-china
>>> @golangchina
>> --
>> by Liigo, http://blog.csdn.net/liigo/
>> Google+ https://plus.google.com/105597640837742873343/
>> --
>> 来自: Golang-China ~ 中文Go语言技术邮件列表
>> 详情: http://groups.google.com/group/golang-china
>> 官网: http://golang-china.org/
>> IRC: irc.freenode.net #golang-china
>> @golangchina
> --
> ---------------------------------------------------------------
> 有志者，事竟成，破釜沉舟，百二秦关终属楚
> 苦心人，天不负，卧薪尝胆，三千越甲可吞吴
> --
> 来自: Golang-China ~ 中文Go语言技术邮件列表
> 详情: http://groups.google.com/group/golang-china
> 官网: http://golang-china.org/
> IRC: irc.freenode.net #golang-china
> @golangchina
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From: fango <fan.how...@gmail.com>Date: Fri, 30 Mar 2012 16:18:36 +0800
Local: Fri, Mar 30 2012 4:18 am
Subject: Re: [gocn:3436] Go1 两行代码编译生成超大EXE
我是想说expose variables.
On Fri, Mar 30, 2012 at 4:13 PM, fango <fan.how ...@gmail.com> wrote: > 应该是Export Variables的缩写。举例是运行godoc，然后 http://localhost:6060/debug/vars。 > fango
> On Fri, Mar 30, 2012 at 3:37 PM, Andy W. Song <wson...@gmail.com> wrote:
>> 话说这个expvar到底是做嘛用的？
>> 2012/3/30 Liigo Zhuang <com.li...@gmail.com>
>>> 哦，明白了。想不到啊。
>>> 在 2012年3月30日 下午3:02，minux <minux...@gmail.com>写道：
>>>> 2012/3/30 Liigo Zhuang <com.li...@gmail.com>
>>>>> 以下代码用到Go1标准库fmt和expvar，仅两行代码，结果编译生成的EXE超大，达 3.2 MB。我的系统是 Windows 7, x86。
>>>>> 按说，如果仅仅输出 fmt.Println("Hello world")，EXE应该在 1.1 MB 是比较正常的表现。
>>>>> 编译方法：
>>>>> go build expvar.go
>>>>> --------------------------------------------------------
>>>>> package main
>>>>> import (
>>>>> "fmt"
>>>>> "expvar"
>>>>> )
>>>>> func main() {
>>>>> fmt.Println("Hello, Go1. This is liigo.")
>>>>> expvar.Do(func(kv expvar.KeyValue){
>>>>> fmt.Printf("\n%s=%s\n",kv.Key,kv.Value) })
>>>>> }
>>>> 问题是你用了expvar，于是你间接引用了超级多的包。
>>>> $ go list -f {{.Deps}} expvar
>>>> [bufio bytes compress/flate compress/gzip crypto crypto/aes crypto/cipher
>>>> crypto/des crypto/dsa crypto/elliptic crypto/hmac crypto/md5 crypto/rand
>>>> crypto/rc4 crypto/rsa crypto/sha1 crypto/subtle crypto/tls crypto/x509
>>>> crypto/x509/pkix encoding/asn1 encoding/base64 encoding/binary encoding/json
>>>> encoding/pem errors fmt hash hash/crc32 io io/ioutil log math math/big
>>>> math/rand mime mime/multipart net net/http net/textproto net/url os path
>>>> path/filepath reflect runtime runtime/cgo runtime/debug sort strconv strings
>>>> sync sync/atomic syscall time unicode unicode/utf16 unicode/utf8 unsafe]
>>>> 看看fmt引用了啥：
>>>> $ go list -f {{.Deps}} fmt
>>>> [errors io math os reflect runtime strconv sync sync/atomic syscall time
>>>> unicode/utf8 unsafe]
>>>> --
>>>> 来自: Golang-China ~ 中文Go语言技术邮件列表
>>>> 详情: http://groups.google.com/group/golang-china
>>>> 官网: http://golang-china.org/
>>>> IRC: irc.freenode.net #golang-china
>>>> @golangchina
>>> --
>>> by Liigo, http://blog.csdn.net/liigo/
>>> Google+ https://plus.google.com/105597640837742873343/
>>> --
>>> 来自: Golang-China ~ 中文Go语言技术邮件列表
>>> 详情: http://groups.google.com/group/golang-china
>>> 官网: http://golang-china.org/
>>> IRC: irc.freenode.net #golang-china
>>> @golangchina
>> --
>> ---------------------------------------------------------------
>> 有志者，事竟成，破釜沉舟，百二秦关终属楚
>> 苦心人，天不负，卧薪尝胆，三千越甲可吞吴
>> --
>> 来自: Golang-China ~ 中文Go语言技术邮件列表
>> 详情: http://groups.google.com/group/golang-china
>> 官网: http://golang-china.org/
>> IRC: irc.freenode.net #golang-china
>> @golangchina
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From: fango <fan.how...@gmail.com>Date: Fri, 30 Mar 2012 16:29:14 +0800
Local: Fri, Mar 30 2012 4:29 am
Subject: Re: [gocn:3436] Go1 两行代码编译生成超大EXE
补充：go list -f {{.Deps | len}} net/http 可以看到实际是这个http很大，使用了56个导入，而expvar只多了两个。
fango
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From: Liigo Zhuang <com.li...@gmail.com>Date: Fri, 30 Mar 2012 16:51:57 +0800
Local: Fri, Mar 30 2012 4:51 am
Subject: Re: [gocn:3436] Go1 两行代码编译生成超大EXE
顶楼的代码在我电脑上会输出以下内容，大致包含了内存使用和命令行信息：
其他还在摸索中……
--------------------------------------------------------------------------- -------------------------------
memstats={"Alloc":286552,"TotalAlloc":298352,"Sys":2621440, ... <<very
long>> ... }
cmdline=["D:\\Users\\liigo\\AppData\\Local\\Temp\\go-build209051666\\comman d-line-arguments\\_obj\\a.out.exe"]
--------------------------------------------------------------------------- -------------------------------
在 2012年3月30日 下午3:37，Andy W. Song <wson...@gmail.com>写道：
> 话说这个expvar到底是做嘛用的？ > 2012/3/30 Liigo Zhuang <com.li...@gmail.com>
>> 哦，明白了。想不到啊。
>> 在 2012年3月30日 下午3:02，minux <minux...@gmail.com>写道：
>>> 2012/3/30 Liigo Zhuang <com.li...@gmail.com>
>>>> 以下代码用到Go1标准库fmt和expvar，仅两行代码，结果编译生成的EXE超大，达 3.2 MB。我的系统是 Windows 7, x86。
>>>> 按说，如果仅仅输出 fmt.Println("Hello world")，EXE应该在 1.1 MB 是比较正常的表现。
>>>> 编译方法：
>>>> go build expvar.go
>>>> --------------------------------------------------------
>>>> package main
>>>> import (
>>>> "fmt"
>>>> "expvar"
>>>> )
>>>> func main() {
>>>> fmt.Println("Hello, Go1. This is liigo.")
>>>> expvar.Do(func(kv expvar.KeyValue){
>>>> fmt.Printf("\n%s=%s\n",kv.Key,kv.Value) })
>>>> }
>>> 问题是你用了expvar，于是你间接引用了超级多的包。
>>> $ go list -f {{.Deps}} expvar
>>> [bufio bytes compress/flate compress/gzip crypto crypto/aes
>>> crypto/cipher crypto/des crypto/dsa crypto/elliptic crypto/hmac crypto/md5
>>> crypto/rand crypto/rc4 crypto/rsa crypto/sha1 crypto/subtle crypto/tls
>>> crypto/x509 crypto/x509/pkix encoding/asn1 encoding/base64 encoding/binary
>>> encoding/json encoding/pem errors fmt hash hash/crc32 io io/ioutil log math
>>> math/big math/rand mime mime/multipart net net/http net/textproto net/url
>>> os path path/filepath reflect runtime runtime/cgo runtime/debug sort
>>> strconv strings sync sync/atomic syscall time unicode unicode/utf16
>>> unicode/utf8 unsafe]
>>> 看看fmt引用了啥：
>>> $ go list -f {{.Deps}} fmt
>>> [errors io math os reflect runtime strconv sync sync/atomic syscall time
>>> unicode/utf8 unsafe]
>>> --
>>> 来自: Golang-China ~ 中文Go语言技术邮件列表
>>> 详情: http://groups.google.com/group/golang-china
>>> 官网: http://golang-china.org/
>>> IRC: irc.freenode.net #golang-china
>>> @golangchina
>> --
>> by *Liigo*, http://blog.csdn.net/liigo/
>> Google+ https://plus.google.com/105597640837742873343/
>> --
>> 来自: Golang-China ~ 中文Go语言技术邮件列表
>> 详情: http://groups.google.com/group/golang-china
>> 官网: http://golang-china.org/
>> IRC: irc.freenode.net #golang-china
>> @golangchina
> --
> ---------------------------------------------------------------
> 有志者，事竟成，破釜沉舟，百二秦关终属楚
> 苦心人，天不负，卧薪尝胆，三千越甲可吞吴
> --
> 来自: Golang-China ~ 中文Go语言技术邮件列表
> 详情: http://groups.google.com/group/golang-china
> 官网: http://golang-china.org/
> IRC: irc.freenode.net #golang-china
> @golangchina
by *Liigo*, http://blog.csdn.net/liigo/
Google+ https://plus.google.com/105597640837742873343/
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