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

enhance reduce_vars (#5248)

Browse Source
This commit is contained in:
Alex Lam S.L
2021-12-31 23:53:47 +00:00
committed by GitHub
parent e7ce1051fe
commit 8d0422b6f3
4 changed files with 15 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
lib/compress.js
View File

@@ -492,7 +492,6 @@ Compressor.prototype.compress = function(node) {
def.reassigned = 0;
def.recursive_refs = 0;
def.references = [];
def.should_replace = undefined;
def.single_use = undefined;
}
@@ -11599,8 +11598,8 @@ Compressor.prototype.compress = function(node) {
def.replaced++;
return value;
}
var local = self.fixed !== def.fixed;
if (fixed && (local || def.should_replace !== false)) {
var state;
if (fixed && (state = self.fixed || def.fixed).should_replace !== false) {
var ev, init;
if (fixed instanceof AST_This) {
if (!is_funarg(def) && same_scope(def)) init = fixed;
@@ -11613,20 +11612,22 @@ Compressor.prototype.compress = function(node) {
init = make_node_from_constant(ev, fixed);
}
if (init) {
if (!local && def.should_replace === undefined) {
if (state.should_replace === undefined) {
var value_length = init.optimize(compressor).print_to_string().length;
if (!has_symbol_ref(fixed)) {
value_length = Math.min(value_length, fixed.print_to_string().length);
}
var name_length = def.name.length;
if (compressor.option("unused") && !compressor.exposed(def)) {
var referenced = def.references.length - def.replaced;
name_length += (name_length + 2 + value_length) / (referenced - def.assignments);
var refs = def.references.length - def.replaced - def.assignments;
refs = Math.min(refs, def.references.filter(function(ref) {
return ref.fixed === state;
}).length);
name_length += (name_length + 2 + value_length) / Math.max(1, refs);
}
var delta = value_length - Math.floor(name_length);
def.should_replace = delta < compressor.eval_threshold;
state.should_replace = value_length - Math.floor(name_length) < compressor.eval_threshold;
}
if (local || def.should_replace) {
if (state.should_replace) {
var value;
if (has_symbol_ref(fixed)) {
value = init.optimize(compressor);