JoBoEVD/UglifyJS
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

speed up OutputStream (#4844)

Browse Source
This commit is contained in:
Alex Lam S.L
2021-04-06 19:57:23 +01:00
committed by GitHub
parent b179a2459f
commit 4870747306
1 changed files with 62 additions and 55 deletions
Download Patch File Download Diff File Expand all files Collapse all files

115
lib/output.js
View File

@@ -101,44 +101,32 @@ function OutputStream(options) {
}
}
var OUTPUT;
var current_col;
var current_line;
var current_pos;
var has_parens;
var indentation;
var current_col = 0;
var current_line = 1;
var current_pos = 0;
var indentation = options.indent_start;
var last;
var line_end;
var line_fixed;
var mappings;
var line_end = 0;
var line_fixed = true;
var mappings = options.source_map && [];
var mapping_name;
var mapping_token;
var might_need_space;
var might_need_semicolon;
var need_newline_indented;
var need_space;
var newline_insert;
var need_newline_indented = false;
var need_space = false;
var newline_insert = -1;
var stack;
var OUTPUT;
function reset() {
OUTPUT = "";
current_col = 0;
current_line = 1;
current_pos = 0;
has_parens = false;
indentation = options.indent_start;
last = "";
line_end = 0;
line_fixed = true;
mappings = options.source_map && [];
mapping_name = null;
mapping_token = null;
might_need_space = false;
might_need_semicolon = false;
need_newline_indented = false;
need_space = false;
newline_insert = -1;
stack = [];
var str = OUTPUT;
OUTPUT = "";
return str;
}
reset();
@@ -266,8 +254,14 @@ function OutputStream(options) {
var requireSemicolonChars = makePredicate("( [ + * / - , .");
function print(str) {
str = String(str);
var print = options.beautify
|| options.comments
|| options.max_line_len
|| options.preserve_line
|| options.shebang
|| !options.semicolons
|| options.source_map
|| options.width ? function(str) {
var ch = str.charAt(0);
if (need_newline_indented && ch) {
need_newline_indented = false;
@@ -337,7 +331,6 @@ function OutputStream(options) {
}
OUTPUT += str;
has_parens = str.slice(-1) == "(";
current_pos += str.length;
var a = str.split(/\r?\n/), n = a.length - 1;
current_line += n;
@@ -347,7 +340,30 @@ function OutputStream(options) {
current_col = a[n].length;
}
last = str;
} : function(str) {
var ch = str.charAt(0);
var prev = last.slice(-1);
if (might_need_semicolon) {
might_need_semicolon = false;
if (prev == ":" && ch == "}" || (!ch || ";}".indexOf(ch) < 0) && prev != ";") {
OUTPUT += ";";
might_need_space = false;
}
}
if (might_need_space) {
if (is_identifier_char(prev) && (is_identifier_char(ch) || ch == "\\")
|| (ch == "/" && ch == prev)
|| ((ch == "+" || ch == "-") && ch == last)
|| str == "--" && last == "!"
|| str == "in" && prev == "/"
|| last == "--" && ch == ">") {
OUTPUT += " ";
}
if (prev != "<" || str != "!") might_need_space = false;
}
OUTPUT += str;
last = str;
};
var space = options.beautify ? function() {
print(" ");
@@ -551,10 +567,10 @@ function OutputStream(options) {
get : get,
reset : reset,
indent : indent,
should_break : function() {
return options.width && current_col - indentation >= options.width;
},
has_parens : function() { return has_parens },
should_break : options.width ? function() {
return current_col - indentation >= options.width;
} : return_false,
has_parens : function() { return last.slice(-1) == "(" },
newline : newline,
print : print,
space : space,
@@ -577,11 +593,8 @@ function OutputStream(options) {
with_square : with_square,
add_mapping : add_mapping,
option : function(opt) { return options[opt] },
prepend_comments: prepend_comments,
append_comments : comment_filter === return_false ? noop : append_comments,
line : function() { return current_line },
col : function() { return current_col },
pos : function() { return current_pos },
prepend_comments: options.comments || options.shebang ? prepend_comments : noop,
append_comments : options.comments ? append_comments : noop,
push_node : function(node) { stack.push(node) },
pop_node : options.preserve_line ? function() {
var node = stack.pop();
@@ -628,9 +641,9 @@ function OutputStream(options) {
});
var readonly = OutputStream({
inline_script: false,
shebang: false,
width: false,
});
readonly.prepend_comments = noop;
readonly.should_break = return_false;
AST_Node.DEFMETHOD("print_to_string", function(options) {
if (options) {
var stream = OutputStream(options);
@@ -638,9 +651,7 @@ function OutputStream(options) {
return stream.get();
}
this.print(readonly);
var str = readonly.get();
readonly.reset();
return str;
return readonly.reset();
});
/* -----[ PARENTHESES ]----- */
@@ -1489,11 +1500,7 @@ function OutputStream(options) {
output.print_string(prop);
output.print("]");
} else {
if (expr instanceof AST_Number && expr.value >= 0) {
if (!/[xa-f.)]/i.test(output.last())) {
output.print(".");
}
}
if (expr instanceof AST_Number && !/[ex.)]/i.test(output.last())) output.print(".");
output.print(".");
// the name after dot would be mapped about here.
output.add_mapping(self.end);
@@ -1743,7 +1750,7 @@ function OutputStream(options) {
output.print("`");
});
DEFPRINT(AST_Constant, function(output) {
output.print(this.value);
output.print("" + this.value);
});
DEFPRINT(AST_String, function(output) {
output.print_string(this.value, this.quote);
@@ -1799,7 +1806,7 @@ function OutputStream(options) {
function force_statement(stat, output) {
if (output.option("braces") && !(stat instanceof AST_Const || stat instanceof AST_Let)) {
make_block(stat, output);
} else if (!stat || stat instanceof AST_EmptyStatement) {
} else if (stat instanceof AST_EmptyStatement) {
output.force_semicolon();
} else {
stat.print(output);
@@ -1850,11 +1857,11 @@ function OutputStream(options) {
}
function make_block(stmt, output) {
if (!stmt || stmt instanceof AST_EmptyStatement)
output.print("{}");
else if (stmt instanceof AST_BlockStatement)
if (stmt instanceof AST_EmptyStatement) {
print_braced_empty(stmt, output);
} else if (stmt instanceof AST_BlockStatement) {
stmt.print(output);
else output.with_block(function() {
} else output.with_block(function() {
output.indent();
stmt.print(output);
output.newline();