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authorJosé Valim <[email protected]>2016-07-16 22:24:50 +0200
committerJosé Valim <[email protected]>2016-08-04 13:22:14 +0200
commita5fcd4f26969a768950dc643eeed2fdb41a5dc41 (patch)
treec20bcd4a5dfeea6ccdc6a05ebd0eeaaeb0854a4d /lib/debugger/test
parentddfae156c2b21d5266bd6eb82bf9ca7c508226fd (diff)
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Move expansion of strings in binaries to v3_core
This speeds up the compilation of binary literals with string values in them. For example, compiling a file with a ~340kB binary would yield the following times by the compiler: Compiling "foo" parse_module : 0.130 s 5327.6 kB transform_module : 0.000 s 5327.6 kB lint_module : 0.011 s 5327.8 kB expand_module : 0.508 s 71881.2 kB v3_core : 0.463 s 11.5 kB Notice the increase in memory and processing time in expand_module and v3_core. This happened because expand_module would expand the string in binaries into chars. For example, the binary <<"foo">>, which is represented as {bin, 1, [ {bin_element, 1, {string, 1, "foo"}, default, default} ]} would be converted to {bin, 1, [ {bin_element, 1, {char, 1, $f}, default, default}, {bin_element, 1, {char, 1, $o}, default, default}, {bin_element, 1, {char, 1, $o}, default, default} ]} However, v3_core would then traverse all of those characters and convert it into an actual binary, as it is a literal value. This patch addresses this issue by moving the expansion of string into chars to v3_core and only if a literal value cannot not be built. This reduces the compilation time of the file mentioned above to the values below: Compiling "bar" parse_module : 0.134 s 5327.6 kB transform_module : 0.000 s 5327.6 kB lint_module : 0.005 s 5327.8 kB expand_module : 0.000 s 5328.7 kB v3_core : 0.013 s 11.2 kB
Diffstat (limited to 'lib/debugger/test')
-rw-r--r--lib/debugger/test/bs_bincomp_SUITE.erl1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/debugger/test/bs_bincomp_SUITE.erl b/lib/debugger/test/bs_bincomp_SUITE.erl
index 39e2240f2d..064e9567b3 100644
--- a/lib/debugger/test/bs_bincomp_SUITE.erl
+++ b/lib/debugger/test/bs_bincomp_SUITE.erl
@@ -66,6 +66,7 @@ end_per_group(_GroupName, Config) ->
byte_aligned(Config) when is_list(Config) ->
<<"abcdefg">> = << <<(X+32)>> || <<X>> <= <<"ABCDEFG">> >>,
+ <<"AxyzBxyzCxyz">> = << <<X, "xyz">> || <<X>> <= <<"ABC">> >>,
<<1:32/little,2:32/little,3:32/little,4:32/little>> =
<< <<X:32/little>> || <<X:32>> <= <<1:32,2:32,3:32,4:32>> >>,
<<1:32/little,2:32/little,3:32/little,4:32/little>> =