Eelco Dolstra 198d0338be Add a primop ‘concatLists’ ... This can serve as a generic efficient list builder. For instance, the function ‘catAttrs’ in Nixpkgs can be rewritten from attr: l: fold (s: l: if hasAttr attr s then [(getAttr attr s)] ++ l else l) [] l to attr: l: builtins.concatLists (map (s: if hasAttr attr s then [(getAttr attr s)] else []) l) Statistics before: time elapsed: 1.08683 size of a value: 24 environments allocated: 1384376 (35809568 bytes) list elements: 6946783 (55574264 bytes) list concatenations: 37434 values allocated: 1760440 (42250560 bytes) attribute sets allocated: 392040 right-biased unions: 186334 values copied in right-biased unions: 591137 symbols in symbol table: 18273 number of thunks: 1297673 number of thunks avoided: 1380759 number of attr lookups: 430802 number of primop calls: 628912 number of function calls: 1333544 Statistics after (including new catAttrs): time elapsed: 0.959854 size of a value: 24 environments allocated: 1010198 (26829296 bytes) list elements: 1984878 (15879024 bytes) list concatenations: 30488 values allocated: 1589760 (38154240 bytes) attribute sets allocated: 392040 right-biased unions: 186334 values copied in right-biased unions: 591137 symbols in symbol table: 18274 number of thunks: 1040925 number of thunks avoided: 1038428 number of attr lookups: 438419 number of primop calls: 474844 number of function calls: 959366		2012-08-13 01:53:10 -04:00
..
attr-path.cc	Fix compilation on FreeBSD	2012-03-05 22:04:40 +01:00
attr-path.hh	Use "#pragma once" to prevent repeated header file inclusion	2012-07-18 14:59:03 -04:00
common-opts.cc	Fix error message	2012-02-09 18:56:48 +01:00
common-opts.hh	Use "#pragma once" to prevent repeated header file inclusion	2012-07-18 14:59:03 -04:00
eval-inline.hh	Use "#pragma once" to prevent repeated header file inclusion	2012-07-18 14:59:03 -04:00
eval.cc	Add a primop ‘concatLists’	2012-08-13 01:53:10 -04:00
eval.hh	Add a primop ‘concatLists’	2012-08-13 01:53:10 -04:00
get-drvs.cc	* Inline some functions and get rid of the indirection through	2012-02-04 13:50:25 +00:00
get-drvs.hh	Use "#pragma once" to prevent repeated header file inclusion	2012-07-18 14:59:03 -04:00
lexer.l	* Add a Nix expression search path feature. Paths between angle	2011-08-06 16:05:24 +00:00
Makefile.am	* Inline some functions and get rid of the indirection through	2012-02-04 13:50:25 +00:00
names.cc	* Export the nix-env derivation name parsing and version comparison	2008-07-01 10:10:32 +00:00
names.hh	Use "#pragma once" to prevent repeated header file inclusion	2012-07-18 14:59:03 -04:00
nix.sdf	First attempt to update Nix SDF grammar to match the actual bison grammar	2008-06-04 14:36:46 +00:00
nixexpr.cc	* Allow a default value in attribute selection by writing	2011-07-13 12:19:57 +00:00
nixexpr.hh	Add some basic profiling support to the evaluator	2012-08-12 23:29:28 -04:00
parser.y	Use Bison 2.5	2012-04-13 14:28:26 +02:00
primops.cc	Add a primop ‘concatLists’	2012-08-13 01:53:10 -04:00
symbol-table.hh	Use "#pragma once" to prevent repeated header file inclusion	2012-07-18 14:59:03 -04:00
value-to-xml.cc	Fix compilation on FreeBSD	2012-03-05 22:04:40 +01:00
value-to-xml.hh	Use "#pragma once" to prevent repeated header file inclusion	2012-07-18 14:59:03 -04:00
value.hh	Use "#pragma once" to prevent repeated header file inclusion	2012-07-18 14:59:03 -04:00