cpu benchmark notes

doc/benchmarks/cpu-usage-overall-notes.txt

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+Steps, roughly:
+
+Capture Task Manager using SimpleScreenRecorder
+
+Launch reference benchmark
+
+Stop and save capture once reference benchmark completes
+
+Extract/crop/scale area to OCR (the CPU figures)
+
+    avconv -i ublock-cpu.webm -r 4 -vsync 1 -vf "[in] crop=40:86:310:100 [T1], [T1] scale=160:360 [out]" -t 2400 img/img-%04d.png
+
+Execute tesseract custom script:
+
+    ./tessall
+
+Then
+
+    cat out.txt | perl -p -000 -e 's/(\d)\n/\1,/g' | perl -p -e 's/,\n$//'
+
+
+tessal script:
+
+    #!/bin/sh
+    rm all.txt
+    echo
+    for i in img/img*.png; do
+        echo -ne '\r' $i
+        b=`basename $i .png`
+        tesseract $i out -psm 6 digits 1>/dev/null 2>&1
+        cat out.txt | perl -p -000 -e 's/(\d+)\s+/\1,/g' | perl -pe 's/,$/\n/' >> all.txt
+    done