Leverage whotracks.me's huge dataset of URLs for benchmark purpose

As seen at:
  https://whotracks.me/blog/adblockers_performance_study.html

The requests.json.gz file can be downloaded from:
  https://cdn.cliqz.com/adblocking/requests_top500.json.gz

Copy the file into ./tmp/requests.json.gz

If the file is present when you build uBO using `make-[target].sh` from
the shell, the resulting package will contain `./assets/requests.json`,
which will be looked-up by the method below to launch a benchmark
session.

From uBO's dev console, launch the benchmark:
  µBlock.staticNetFilteringEngine.benchmark();

The usual browser dev tools can be used to obtain useful profiling
data, i.e. start the profiler, call the benchmark method from the
console, then stop the profiler when it completes.

Keep in mind that the measurements at the blog post above where obtained
with ONLY EasyList. The CPU reportedly used was:
  https://www.cpubenchmark.net/cpu.php?cpu=Intel+Core+i7-6600U+%40+2.60GHz&id=2608

Rename ./tmp/requests.json.gz to something else if you no longer want
./assets/requests.json in the build.

src/js/static-net-filtering.js

@@ -58,6 +58,7 @@ const typeNameToTypeValue = {
             'object':  3 << 4,
  'object_subrequest':  3 << 4,
             'script':  4 << 4,
+             'fetch':  5 << 4,
     'xmlhttprequest':  5 << 4,
          'sub_frame':  6 << 4,
               'font':  7 << 4,
@@ -2792,14 +2793,72 @@ FilterContainer.prototype.getFilterCount = function() {
 
 /******************************************************************************/
 
-FilterContainer.prototype.benchmark = function(contexts) {
+// The requests.json.gz file can be downloaded from:
-    const t0 = performance.now();
+//   https://cdn.cliqz.com/adblocking/requests_top500.json.gz
-    const results = [];
+//
-    for ( const context of contexts ) {
+// Which is linked from:
-         results.push(this.matchString(context));
+//   https://whotracks.me/blog/adblockers_performance_study.html
-    }
+//
-    const t1 = performance.now();
+// Copy the file into ./tmp/requests.json.gz
-    return { t0, t1, duration: t1 - t0, results };
+//
+// If the file is present when you build uBO using `make-[target].sh` from
+// the shell, the resulting package will have `./assets/requests.json`, which
+// will be looked-up by the method below to launch a benchmark session.
+//
+// From uBO's dev console, launch the benchmark:
+//   µBlock.staticNetFilteringEngine.benchmark();
+//
+// The usual browser dev tools can be used to obtain useful profiling
+// data, i.e. start the profiler, call the benchmark method from the
+// console, then stop the profiler when it completes.
+//
+// Keep in mind that the measurements at the blog post above where obtained
+// with ONLY EasyList. The CPU reportedly used was:
+//   https://www.cpubenchmark.net/cpu.php?cpu=Intel+Core+i7-6600U+%40+2.60GHz&id=2608
+//
+// Rename ./tmp/requests.json.gz to something else if you no longer want
+// ./assets/requests.json in the build.
+
+FilterContainer.prototype.benchmark = function() {
+    new Promise(resolve => {
+        const url = vAPI.getURL('/assets/requests.json');
+        µb.assets.fetchText(vAPI.getURL('/assets/requests.json'), details => {
+            if ( details.error !== undefined ) {
+                console.info(`Not found: ${url}`);
+                resolve();
+                return;
+            }
+            const requests = [];
+            const lineIter = new µb.LineIterator(details.content);
+            while ( lineIter.eot() === false ) {
+                let request;
+                try {
+                    request = JSON.parse(lineIter.next());
+                } catch(ex) {
+                }
+                if ( request instanceof Object === false ) { continue; }
+                requests.push(request);
+            }
+            resolve(requests);
+        });
+    }).then(requests => {
+        if ( Array.isArray(requests) === false || requests.length === 0 ) {
+            console.info('No requests found to benchmark');
+            return;
+        }
+        const fctxt = µb.filteringContext;
+        const t0 = self.performance.now();
+        for ( const request of requests ) {
+            fctxt.url = request.url;
+            fctxt.setDocOriginFromURL(request.frameUrl);
+            fctxt.setType(request.cpt);
+            void this.matchString(fctxt);
+        }
+        const t1 = self.performance.now();
+        const dur = t1 - t0;
+        console.info(`Evaluated ${requests.length} requests in ${dur.toFixed(0)} ms`);
+        console.info(`\tAverage: ${(dur / requests.length).toFixed(3)} ms per request`);
+    });
 };
 
 /******************************************************************************/

tools/make-assets.sh

@@ -14,7 +14,11 @@ fi
 
 rm -rf $DES
 mkdir $DES
-cp    ./assets/assets.json                                       $DES/
+cp ./assets/assets.json $DES/
+
+if [ -f ./tmp/requests.json.gz ]; then
+    gunzip -c ./tmp/requests.json.gz > $DES/requests.json
+fi
 
 mkdir $DES/thirdparties
 cp -R ../uAssets/thirdparties/easylist-downloads.adblockplus.org $DES/thirdparties/