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Makes file matching / expanding much faster (in some situations twice as fast) #1562

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Makes file matching / expanding much faster (in some situations twice as fast) #1562

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8755cdd
Improves performance of `file.expand`, `file.expandMapping`, and `tas…
cspotcode Nov 7, 2016
56131e3
Improves performance of glob exclusions by avoiding extra glob IO
cspotcode Nov 7, 2016
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22 changes: 19 additions & 3 deletions lib/grunt/file.js
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Expand Up @@ -38,7 +38,8 @@ file.setBase = function() {

// Process specified wildcard glob patterns or filenames against a
// callback, excluding and uniquing files in the result set.
var processPatterns = function(patterns, fn) {
var processPatterns = function(patterns, fn, exclusionFn) {
if (typeof exclusionFn === 'undefined') { exclusionFn = fn; }
// Filepaths to return.
var result = [];
// Iterate over flattened patterns array.
Expand All @@ -48,7 +49,7 @@ var processPatterns = function(patterns, fn) {
// If the pattern is an exclusion, remove the !
if (exclusion) { pattern = pattern.slice(1); }
// Find all matching files for this pattern.
var matches = fn(pattern);
var matches = (exclusion ? exclusionFn : fn)(pattern, result);
if (exclusion) {
// If an exclusion, remove matching files.
result = grunt.util._.difference(result, matches);
Expand Down Expand Up @@ -93,6 +94,8 @@ file.expand = function() {
// If the first argument is an options object, save those options to pass
// into the file.glob.sync method.
var options = grunt.util.kindOf(args[0]) === 'object' ? args.shift() : {};
// Cache fs calls across multiple file.glob.sync operations
var globOptions = grunt.util._.extend(file._createGlobIoCache(), options);
// Use the first argument if it's an Array, otherwise convert the arguments
// object to an array and use that.
var patterns = Array.isArray(args[0]) ? args[0] : args;
Expand All @@ -101,7 +104,9 @@ file.expand = function() {
// Return all matching filepaths.
var matches = processPatterns(patterns, function(pattern) {
// Find all matching files for this pattern.
return file.glob.sync(pattern, options);
return file.glob.sync(pattern, globOptions);
}, function(pattern, resultsThusFar) {
return file.match(options, [pattern], resultsThusFar);
});
// Filter result set?
if (options.filter) {
Expand Down Expand Up @@ -452,3 +457,14 @@ file.isPathInCwd = function() {
return false;
}
};

// Creates all glob options that store cached fs results for the `glob` library.
// Can be removed when this glob PR is released: https://github.com/isaacs/node-glob/pull/306
file._createGlobIoCache = function() {
return {
cache: Object.create(null),
statCache: Object.create(null),
symlinks: Object.create(null),
realpathCache: Object.create(null)
};
};
3 changes: 2 additions & 1 deletion lib/grunt/task.js
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Expand Up @@ -117,6 +117,7 @@ task.normalizeMultiTaskFiles = function(data, target) {
}

// Process all normalized file objects.
var globIoCache = grunt.file._createGlobIoCache();
files = grunt.util._(files).chain().forEach(function(obj) {
if (!('src' in obj) || !obj.src) { return; }
// Normalize .src properties to flattened array.
Expand All @@ -127,7 +128,7 @@ task.normalizeMultiTaskFiles = function(data, target) {
}
}).map(function(obj) {
// Build options object, removing unwanted properties.
var expandOptions = grunt.util._.extend({}, obj);
var expandOptions = grunt.util._.extend({}, globIoCache, obj);
delete expandOptions.src;
delete expandOptions.dest;

Expand Down