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Add filterClassHistogram() method to µBlock.staticNetFilteringEngine
As a development tool for investigation purpose. To use, enter the following at uBO's dev console: µBlock.staticNetFilteringEngine.filterClassHistogram()
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@ -2885,6 +2885,52 @@ FilterContainer.prototype.bucketHistogram = function() {
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/******************************************************************************/
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FilterContainer.prototype.filterClassHistogram = function() {
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const filterClassDetails = new Map();
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for ( let i = 0; i < filterClasses.length; i++ ) {
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filterClassDetails.set(i, { name: filterClasses[i].name, count: 0, });
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}
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// Artificial classes to report content of tries
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filterClassDetails.set(1000, { name: 'FilterPrefix1Trie', count: 0, });
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filterClassDetails.set(1001, { name: 'FilterHnAnchoredTrie', count: 0, });
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const countFilter = function(f) {
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if ( f instanceof Object === false ) { return; }
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filterClassDetails.get(f.fid).count += 1;
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if ( f.wrapped ) {
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countFilter(f.wrapped);
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}
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};
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for ( const category of this.categories.values() ) {
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for ( const f of category.values() ) {
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countFilter(f);
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if ( f instanceof FilterBucket ) {
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for ( const g of f.filters ) { countFilter(g); }
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if ( f.plainPrefix1Trie !== null ) {
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filterClassDetails.get(1000).count += f.plainPrefix1Trie.size;
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}
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if ( f.plainHnAnchoredTrie !== null ) {
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filterClassDetails.get(1001).count += f.plainHnAnchoredTrie.size;
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}
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continue;
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}
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if ( f instanceof FilterPair ) {
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countFilter(f.f1);
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countFilter(f.f2);
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continue;
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}
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}
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}
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const results = Array.from(filterClassDetails.values()).sort((a, b) => {
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return b.count - a.count;
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});
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console.log(results);
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};
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/******************************************************************************/
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return new FilterContainer();
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/******************************************************************************/
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