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Merge performance enhancements from 4.x #1998

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Merge performance enhancements from 4.x #1998

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cf5c0be
Fix non-contiguous program indices
mohd-akram Sep 3, 2023
53a5f13
Improve partial indenting performance
mohd-akram Sep 4, 2023
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14 changes: 6 additions & 8 deletions lib/handlebars/compiler/javascript-compiler.js
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Original file line number Diff line number Diff line change
Expand Up @@ -164,12 +164,10 @@ JavaScriptCompiler.prototype = {

let { programs, decorators } = this.context;
for (i = 0, l = programs.length; i < l; i++) {
if (programs[i]) {
ret[i] = programs[i];
if (decorators[i]) {
ret[i + '_d'] = decorators[i];
ret.useDecorators = true;
}
ret[i] = programs[i];
if (decorators[i]) {
ret[i + '_d'] = decorators[i];
ret.useDecorators = true;
}
}

Expand Down Expand Up @@ -833,8 +831,8 @@ JavaScriptCompiler.prototype = {
let existing = this.matchExistingProgram(child);

if (existing == null) {
this.context.programs.push(''); // Placeholder to prevent name conflicts for nested children
let index = this.context.programs.length;
// Placeholder to prevent name conflicts for nested children
let index = this.context.programs.push('') - 1;
child.index = index;
child.name = 'program' + index;
this.context.programs[index] = compiler.compile(
Expand Down
11 changes: 2 additions & 9 deletions lib/handlebars/runtime.js
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Original file line number Diff line number Diff line change
Expand Up @@ -93,15 +93,8 @@ export function template(templateSpec, env) {
}
if (result != null) {
if (options.indent) {
let lines = result.split('\n');
for (let i = 0, l = lines.length; i < l; i++) {
if (!lines[i] && i + 1 === l) {
break;
}

lines[i] = options.indent + lines[i];
}
result = lines.join('\n');
result =
options.indent + result.replace(/\n(?!$)/g, '\n' + options.indent);
}
return result;
} else {
Expand Down
8 changes: 4 additions & 4 deletions spec/expected/non.empty.amd.known.helper.js
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Original file line number Diff line number Diff line change
@@ -1,15 +1,15 @@
define(['handlebars.runtime'], function(Handlebars) {
Handlebars = Handlebars["default"]; var template = Handlebars.template, templates = Handlebars.templates = Handlebars.templates || {};
return templates['known.helpers'] = template({"1":function(container,depth0,helpers,partials,data) {
return templates['known.helpers'] = template({"0":function(container,depth0,helpers,partials,data) {
var stack1, lookupProperty = container.lookupProperty || function(parent, propertyName) {
if (Object.prototype.hasOwnProperty.call(parent, propertyName)) {
return parent[propertyName];
}
return undefined
};
return " <div>Some known helper</div>\n"
+ ((stack1 = lookupProperty(helpers,"anotherHelper").call(depth0 != null ? depth0 : (container.nullContext || {}),true,{"name":"anotherHelper","hash":{},"fn":container.program(2, data, 0),"inverse":container.noop,"data":data,"loc":{"start":{"line":3,"column":4},"end":{"line":5,"column":22}}})) != null ? stack1 : "");
},"2":function(container,depth0,helpers,partials,data) {
+ ((stack1 = lookupProperty(helpers,"anotherHelper").call(depth0 != null ? depth0 : (container.nullContext || {}),true,{"name":"anotherHelper","hash":{},"fn":container.program(1, data, 0),"inverse":container.noop,"data":data,"loc":{"start":{"line":3,"column":4},"end":{"line":5,"column":22}}})) != null ? stack1 : "");
},"1":function(container,depth0,helpers,partials,data) {
return " <div>Another known helper</div>\n";
},"compiler":[8,">= 4.3.0"],"main":function(container,depth0,helpers,partials,data) {
var stack1, lookupProperty = container.lookupProperty || function(parent, propertyName) {
Expand All @@ -18,7 +18,7 @@ return parent[propertyName];
}
return undefined
};
return ((stack1 = lookupProperty(helpers,"someHelper").call(depth0 != null ? depth0 : (container.nullContext || {}),true,{"name":"someHelper","hash":{},"fn":container.program(1, data, 0),"inverse":container.noop,"data":data,"loc":{"start":{"line":1,"column":0},"end":{"line":6,"column":15}}})) != null ? stack1 : "");
return ((stack1 = lookupProperty(helpers,"someHelper").call(depth0 != null ? depth0 : (container.nullContext || {}),true,{"name":"someHelper","hash":{},"fn":container.program(0, data, 0),"inverse":container.noop,"data":data,"loc":{"start":{"line":1,"column":0},"end":{"line":6,"column":15}}})) != null ? stack1 : "");
},"useData":true});
});