hello_world with release and non-release compilers

gistfile1.txt

non release compiler:
Wed Jan 25: compile/ >  bin/crystal ../examples/hello/hello.cr --
release --stats
Using compiled compiler at .build/crystal
Parse:                             00:00:00.0409620 (   0.19MB)
Semantic (top level):              00:00:00.5428400 (  26.57MB)
Semantic (new):                    00:00:00.0078450 (  26.57MB)
Semantic (type declarations):      00:00:00.0535600 (  26.57MB)
Semantic (abstract def check):     00:00:00.0026690 (  26.57MB)
Semantic (cvars initializers):     00:00:00.0243660 (  34.57MB)
Semantic (ivars initializers):     00:00:00.0021480 (  34.57MB)
Semantic (main):                   00:00:00.1856690 (  42.64MB)
Semantic (cleanup):                00:00:00.0014320 (  42.64MB)
Semantic (recursive struct check): 00:00:00.1200140 (  42.64MB)
Codegen (crystal):                 00:00:00.5278460 (  50.64MB)
here
target_machine.triple # => "x86_64-apple-macosx"
Codegen (bc+obj):                  00:00:04.1218870 (  50.64MB)
Codegen (linking):                 00:00:00.0259180 (  50.64MB)
hello world
Execute:                           00:00:00.0251830 (  50.64MB)
Wed Jan 25: compile/ >  

########################################################

with release compiler:

Wed Jan 25: compile/ >  bin/crystal ../examples/hello/hello.cr --
release --stats
Using compiled compiler at .build/crystal
Parse:                             00:00:00.0067820 (   0.19MB)
Semantic (top level):              00:00:00.1244610 (  27.00MB)
Semantic (new):                    00:00:00.0011990 (  27.00MB)
Semantic (type declarations):      00:00:00.0207600 (  27.00MB)
Semantic (abstract def check):     00:00:00.0129020 (  27.00MB)
Semantic (cvars initializers):     00:00:00.0497150 (  35.00MB)
Semantic (ivars initializers):     00:00:00.0007020 (  35.00MB)
Semantic (main):                   00:00:00.0556360 (  43.00MB)
Semantic (cleanup):                00:00:00.0006710 (  43.00MB)
Semantic (recursive struct check): 00:00:00.0410990 (  43.06MB)
Codegen (crystal):                 00:00:00.1081170 (  51.06MB)
here
target_machine.triple # => "x86_64-apple-macosx"
Codegen (bc+obj):                  00:00:04.1047770 (  51.06MB)
Codegen (linking):                 00:00:00.0230390 (  51.06MB)
hello world
Execute:                           00:00:00.0379930 (  51.06MB)
Wed Jan 25: compile/ >