在HTDP初学者中运行
在
我刚刚安装了DrRacket，并试用了"如何设计程序-初学者"语言。
Racket-一种可编程编程语言
Racket-入门
我运行(+ 1 1)，它需要超过10秒才能显示出来：
Welcome to DrRacket, version 6.5 [3m].
Language: Beginning Student; memory limit: 128 MB.
2
>
据我所知，我的安装几乎是"开箱即用"的。
我想知道的是，我的经历是否不同寻常，
，如果是的话，是否有任何明显的方法来解决它
(我已经查看了设置，没有发现任何明显的调整)，
，或者整个HTDP语言是否被悄悄放弃了，或者。。。？
编辑1
我有这些文件：
/usr/share/racket $
find -iname "*htdp*.zo"
./pkgs/htdp-lib/lang/private/compiled/create-htdp-executable_rkt.zo
./pkgs/htdp-lib/lang/compiled/htdp-reader_rkt.zo
./pkgs/htdp-lib/lang/compiled/htdp-beginner-abbr-reader_rkt.zo
./pkgs/htdp-lib/lang/compiled/htdp-langs-save-file-prefix_rkt.zo
./pkgs/htdp-lib/lang/compiled/htdp-advanced-reader_rkt.zo
./pkgs/htdp-lib/lang/compiled/htdp-intermediate-lambda-reader_rkt.zo
./pkgs/htdp-lib/lang/compiled/htdp-advanced_rkt.zo
./pkgs/htdp-lib/lang/compiled/htdp-beginner-abbr_rkt.zo
./pkgs/htdp-lib/lang/compiled/htdp-intermediate_rkt.zo
./pkgs/htdp-lib/lang/compiled/htdp-intermediate-reader_rkt.zo
./pkgs/htdp-lib/lang/compiled/htdp-langs_rkt.zo
./pkgs/htdp-lib/lang/compiled/htdp-beginner_rkt.zo
./pkgs/htdp-lib/lang/compiled/htdp-intermediate-lambda_rkt.zo
./pkgs/htdp-lib/lang/compiled/htdp-beginner-reader_rkt.zo
./pkgs/htdp-doc/scribblings/htdp-langs/compiled/htdp-langs_scrbl.zo
./pkgs/htdp-doc/scribblings/htdp-langs/compiled/htdp-ptr_scrbl.zo
./pkgs/htdp-doc/htdp/compiled/htdp_scrbl.zo
./pkgs/htdp-doc/htdp/compiled/htdp-lib_scrbl.zo
./pkgs/htdp-doc/teachpack/htdp/scribblings/compiled/htdp_scrbl.zo
./pkgs/htdp-doc/teachpack/2htdp/scribblings/compiled/2htdp_scrbl.zo
编辑2-cpu和硬盘驱动器规格
CPU
$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 28
model name : Intel(R) Atom(TM) CPU N450 @ 1.66GHz
stepping : 10
microcode : 0x107
cpu MHz : 1000.000
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts nopl aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm movbe lahf_lm dtherm
bugs :
bogomips : 3325.00
clflush size : 64
cache_alignment : 64
address sizes : 32 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 28
model name : Intel(R) Atom(TM) CPU N450 @ 1.66GHz
stepping : 10
microcode : 0x107
cpu MHz : 1000.000
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts nopl aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm movbe lahf_lm dtherm
bugs :
bogomips : 3325.00
clflush size : 64
cache_alignment : 64
address sizes : 32 bits physical, 48 bits virtual
power management:
HD
$ sudo hdparm -I /dev/sda
/dev/sda:
ATA device, with non-removable media
Model Number: Hitachi HTS545016B9A300
Serial Number: 100324PBPB06ECC0K6XL
Firmware Revision: PBBOC60F
Transport: Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6; Revision: ATA8-AST T13 Project D1697 Revision 0b
Standards:
Used: unknown (minor revision code 0x0028)
Supported: 8 7 6 5
Likely used: 8
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 268435455
LBA48 user addressable sectors: 312581808
Logical/Physical Sector size: 512 bytes
device size with M = 1024*1024: 152627 MBytes
device size with M = 1000*1000: 160041 MBytes (160 GB)
cache/buffer size = 7208 KBytes (type=DualPortCache)
Form Factor: 2.5 inch
Nominal Media Rotation Rate: 5400
Capabilities:
LBA, IORDY(can be disabled)
Queue depth: 32
Standby timer values: spec'd by Vendor, no device specific minimum
R/W multiple sector transfer: Max = 16 Current = 16
Advanced power management level: 254
Recommended acoustic management value: 128, current value: 254
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* SMART feature set
Security Mode feature set
* Power Management feature set
* Write cache
* Look-ahead
* Host Protected Area feature set
* WRITE_BUFFER command
* READ_BUFFER command
* NOP cmd
* DOWNLOAD_MICROCODE
* Advanced Power Management feature set
Power-Up In Standby feature set
* SET_FEATURES required to spinup after power up
SET_MAX security extension
Automatic Acoustic Management feature set
* 48-bit Address feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
* General Purpose Logging feature set
* WRITE_{DMA|MULTIPLE}_FUA_EXT
* 64-bit World wide name
* IDLE_IMMEDIATE with UNLOAD
* WRITE_UNCORRECTABLE_EXT command
* {READ,WRITE}_DMA_EXT_GPL commands
* Segmented DOWNLOAD_MICROCODE
* Gen1 signaling speed (1.5Gb/s)
* Gen2 signaling speed (3.0Gb/s)
* Native Command Queueing (NCQ)
* Host-initiated interface power management
* Phy event counters
* NCQ priority information
Non-Zero buffer offsets in DMA Setup FIS
* DMA Setup Auto-Activate optimization
Device-initiated interface power management
In-order data delivery
* Software settings preservation
* SMART Command Transport (SCT) feature set
* SCT Write Same (AC2)
* SCT Error Recovery Control (AC3)
* SCT Features Control (AC4)
* SCT Data Tables (AC5)
Security:
Master password revision code = 65534
supported
not enabled
not locked
frozen
not expired: security count
supported: enhanced erase
64min for SECURITY ERASE UNIT. 66min for ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 5000cca5ffc040a7
NAA : 5
IEEE OUI : 000cca
Unique ID : 5ffc040a7
Checksum: correct
EDIT 3命令行时间
在HTDP初学者中运行(+ 1 1)3次--超过5秒
$ time racket -t racket_HTDP_beginner.rkt
2
5.60user 1.04system 0:08.46elapsed 78%CPU (0avgtext+0avgdata 127968maxresident)k
5496inputs+0outputs (46major+40955minor)pagefaults 0swaps
$ time racket -t racket_HTDP_beginner.rkt
2
5.51user 0.67system 0:06.71elapsed 92%CPU (0avgtext+0avgdata 128124maxresident)k
24inputs+0outputs (0major+41790minor)pagefaults 0swaps
$ time racket -t racket_HTDP_beginner.rkt
2
5.41user 0.67system 0:06.55elapsed 92%CPU (0avgtext+0avgdata 128180maxresident)k
0inputs+0outputs (0major+36683minor)pagefaults 0swaps
在#lang racket中运行(+ 1 1)3 3次--一位超过2秒
$ time racket -t racket_lang_racket.rkt
2
2.13user 0.25system 0:02.71elapsed 87%CPU (0avgtext+0avgdata 64996maxresident)k
0inputs+0outputs (0major+12437minor)pagefaults 0swaps
$ time racket -t racket_lang_racket.rkt
2
2.15user 0.25system 0:02.63elapsed 91%CPU (0avgtext+0avgdata 61700maxresident)k
0inputs+0outputs (0major+15853minor)pagefaults 0swaps
$ time racket -t racket_lang_racket.rkt
2
2.28user 0.29system 0:02.89elapsed 89%CPU (0avgtext+0avgdata 61500maxresident)k
0inputs+0outputs (0major+15015minor)pagefaults 0swaps
编辑4
每秒运行free -h，而DrRacket正在lang HTDP初学者中运行(+ 1 1)
http://pastebin.com/2RdZAuXj
当时我不得不杀了拉基特医生，因为一切都冻结了。
不管怎样，是的，很明显它在泄漏。
每次我在DrRacket中重新运行代码时，内存使用率都会上升并保持不变。
我只跑了大约二十。。。两次以上
(所以可能总共三十次？)
到它开始接近极限
时，我杀死了它来解冻系统。
我想我应该用普通的#lang racket试试这个，看看会发生什么。。。
编辑5
是的，它以同样的方式泄漏：
http://pastebin.com/373PNnY7
我敢肯定，您不得不等待的原因是Racket的安装没有正确完成。
在安装过程中，需要运行程序setup-plt。它将所有球拍文件(.rkt)预编译为所谓的zo文件。如果省略此步骤，则DrRacket在第一次需要文件时为您进行编译。
在你的情况下(我猜)这是你第一次使用初学者语言，所以所有与之相关的文件都需要编译。这需要一段时间。
最好的解决方案是使用http://download.racket-lang.org/它们都包括预编译的zo文件。
如果你碰巧使用了这样的安装程序，请再试一次，如果问题仍然存在，请提交一份错误报告(使用DrRacket中"帮助"菜单中的错误报告)。