On Wed, 12 Feb 2014 06:07:17 -0700 Matthew Flatt <mfl...@cs.utah.edu> wrote:
> At Wed, 12 Feb 2014 06:02:30 +0100, Manfred Lotz wrote: > > I just read Neil van Dyke's statement: > > > > < "#lang racket" is for demos, IMHO; I *always* use "#lang > > racket/base" < for any code that's not a demo. > > > > Question: What are the advantages of doing requires explicitly? > > > > In a program of mine I changed #lang racket to #lang racket/base and > > added: > > > > (require racket/cmdline) > > (require racket/string) > > (require racket/format) > > (require racket/port) > > (require racket/path) > > (require racket/list) > > > > > > The resulting executable (created by raco exe...) had the same size. > > I'm surprised that they were the same size, assuming that you didn't > import other libraries that have more dependencies. > > With these two files: > > r.rkt > ----- > #lang racket > > My system is a 64 bit Fedora 20. Size here is: 5045135 > b.rkt > ----- > #lang racket/base > (require racket/cmdline > racket/string > racket/format > racket/port > racket/path > racket/list) > > on my machine, `raco exe b.rkt` produces a 2.4 MB executable, while > `raco exe r.rkt` produces a 5.2MB executable. > Hm, ok you are right. This one has size: 2123527 I had to add more stuff: racket/date which makes it much larger: 4029753 (require openssl) (require openssl/sha1) which makes a size of: 4511202 In my source I found a mistake. I had a require for a file.rkt which still had racket instead of racket/base. Changing this saved me 1 MB compared to the initial 5602007 bytes size. > There's a similarly significant difference in startup times for me: > > laptop% time racket -l racket/base > 0.030u 0.013s 0:00.04 100.0% 0+0k 0+0io 0pf+0w > laptop% time racket -l racket/base -l racket/string -l > racket/cmdline \ -l racket/format -l racket/port -l racket/path -l > racket/list 0.103u 0.029s 0:00.13 92.3% 0+0k 0+0io 0pf+0w > laptop% time racket -l racket > 0.155u 0.041s 0:00.19 100.0% 0+0k 0+0io 0pf+0w > These times are similar on my system. -- Manfred ____________________ Racket Users list: http://lists.racket-lang.org/users
