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authorBjörn Gustavsson <[email protected]>2015-02-24 06:51:13 +0100
committerBjörn Gustavsson <[email protected]>2015-02-25 15:14:30 +0100
commit7a42d7ee12cba812367682ee49eaf33d33991960 (patch)
treedee63932a91a8263396f3f972119a3f4a9a07c16 /lib/tools/src
parent2823f281f169e77f205c273b624bbb37b4ad862f (diff)
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cover: Optimize file operations
Use the 'raw', 'delayed_write', and 'read_head' options to speed up file operations. The analysis at the end of: ts:run(compiler, [batch,cover]). is now roughly twice as fast.
Diffstat (limited to 'lib/tools/src')
-rw-r--r--lib/tools/src/cover.erl28
1 files changed, 15 insertions, 13 deletions
diff --git a/lib/tools/src/cover.erl b/lib/tools/src/cover.erl
index 9a76084bc0..6c32c47069 100644
--- a/lib/tools/src/cover.erl
+++ b/lib/tools/src/cover.erl
@@ -2377,9 +2377,9 @@ do_analyse_to_file(Module,File,OutFile,HTML,State) ->
%% Module = atom()
%% OutFile = ErlFile = string()
do_analyse_to_file1(Module, OutFile, ErlFile, HTML) ->
- case file:open(ErlFile, [read]) of
+ case file:open(ErlFile, [read,raw,read_ahead]) of
{ok, InFd} ->
- case file:open(OutFile, [write]) of
+ case file:open(OutFile, [write,raw,delayed_write]) of
{ok, OutFd} ->
if HTML ->
Encoding = encoding(ErlFile),
@@ -2422,7 +2422,9 @@ do_analyse_to_file1(Module, OutFile, ErlFile, HTML) ->
CovLines = lists:keysort(1,ets:select(?COLLECTION_TABLE, MS)),
print_lines(Module, CovLines, InFd, OutFd, 1, HTML),
- if HTML -> io:format(OutFd,"</pre>\n</body>\n</html>\n",[]);
+ if
+ HTML ->
+ file:write(OutFd, "</pre>\n</body>\n</html>\n");
true -> ok
end,
@@ -2441,13 +2443,13 @@ do_analyse_to_file1(Module, OutFile, ErlFile, HTML) ->
print_lines(Module, CovLines, InFd, OutFd, L, HTML) ->
- case io:get_line(InFd, '') of
+ case file:read_line(InFd) of
eof ->
ignore;
- "%"++_=Line -> %Comment line - not executed.
- io:put_chars(OutFd, [tab(),escape_lt_and_gt(Line, HTML)]),
+ {ok,"%"++_=Line} -> %Comment line - not executed.
+ file:write(OutFd, [tab(),escape_lt_and_gt(Line, HTML)]),
print_lines(Module, CovLines, InFd, OutFd, L+1, HTML);
- RawLine ->
+ {ok,RawLine} ->
Line = escape_lt_and_gt(RawLine,HTML),
case CovLines of
[{L,N}|CovLines1] ->
@@ -2459,20 +2461,20 @@ print_lines(Module, CovLines, InFd, OutFd, L, HTML) ->
%%Str = string:right("0", 6, 32),
RedLine = ["<font color=red>",Str,fill1(),
LineNoNL,"</font>\n"],
- io:put_chars(OutFd, RedLine);
+ file:write(OutFd, RedLine);
N<1000000 ->
Str = string:right(integer_to_list(N), 6, 32),
- io:put_chars(OutFd, [Str,fill1(),Line]);
+ file:write(OutFd, [Str,fill1(),Line]);
N<10000000 ->
Str = integer_to_list(N),
- io:put_chars(OutFd, [Str,fill2(),Line]);
+ file:write(OutFd, [Str,fill2(),Line]);
true ->
Str = integer_to_list(N),
- io:put_chars(OutFd, [Str,fill3(),Line])
+ file:write(OutFd, [Str,fill3(),Line])
end,
print_lines(Module, CovLines1, InFd, OutFd, L+1, HTML);
_ ->
- io:put_chars(OutFd, [tab(),Line]),
+ file:write(OutFd, [tab(),Line]),
print_lines(Module, CovLines, InFd, OutFd, L+1, HTML)
end
end.
@@ -2484,7 +2486,7 @@ fill3() -> "| ".
%%%--Export--------------------------------------------------------------
do_export(Module, OutFile, From, State) ->
- case file:open(OutFile,[write,binary,raw]) of
+ case file:open(OutFile,[write,binary,raw,delayed_write]) of
{ok,Fd} ->
Reply =
case Module of