Mako also benefits a bit:

restart unity8-dash MIR_CLIENT_PERF_REPORT=log
tail -f ~/.cache/upstart/unity8-dash.log

[1439963004.335110] perf: Scopes: 53.83 FPS, render time 16.29ms, buffer lag 
39.79ms (3 buffers)
[1439963005.338590] perf: Scopes: 54.83 FPS, render time 16.02ms, buffer lag 
38.80ms (3 buffers)
[1439963006.340451] perf: Scopes: 55.94 FPS, render time 16.14ms, buffer lag 
36.86ms (3 buffers)
[1439963007.351133] perf: Scopes: 47.52 FPS, render time 19.31ms, buffer lag 
43.84ms (3 buffers)
[1439963008.363494] perf: Scopes: 57.31 FPS, render time 15.04ms, buffer lag 
37.34ms (3 buffers)
[1439963009.384706] perf: Scopes: 56.80 FPS, render time 16.13ms, buffer lag 
36.59ms (3 buffers)
[1439963010.451729] perf: Scopes: 49.67 FPS, render time 18.56ms, buffer lag 
39.77ms (3 buffers)
[1439963011.457985] perf: Scopes: 58.64 FPS, render time 15.30ms, buffer lag 
38.11ms (3 buffers)
[1439963012.468362] perf: Scopes: 56.43 FPS, render time 16.90ms, buffer lag 
36.48ms (3 buffers)

restart unity8 QML_NO_TOUCH_COMPRESSION=1
restart unity8-dash MIR_CLIENT_PERF_REPORT=log
tail -f ~/.cache/upstart/unity8-dash.log

[1439963121.853194] perf: Scopes: 61.87 FPS, render time 12.15ms, buffer lag 
36.61ms (3 buffers)
[1439963122.863754] perf: Scopes: 59.40 FPS, render time 10.45ms, buffer lag 
40.20ms (3 buffers)
[1439963123.866348] perf: Scopes: 59.88 FPS, render time 14.06ms, buffer lag 
36.28ms (3 buffers)
[1439963124.875901] perf: Scopes: 60.45 FPS, render time 10.91ms, buffer lag 
38.34ms (3 buffers)
[1439963125.930898] perf: Scopes: 55.97 FPS, render time 12.45ms, buffer lag 
39.29ms (3 buffers)
[1439963126.976923] perf: Scopes: 59.27 FPS, render time 12.67ms, buffer lag 
38.09ms (3 buffers)
[1439963128.001339] perf: Scopes: 60.54 FPS, render time 11.60ms, buffer lag 
39.43ms (3 buffers)
[1439963129.009977] perf: Scopes: 61.50 FPS, render time 12.01ms, buffer lag 
36.53ms (3 buffers)
[1439963130.014616] perf: Scopes: 55.77 FPS, render time 14.85ms, buffer lag 
39.11ms (3 buffers)

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https://bugs.launchpad.net/bugs/1486341

Title:
  Touch scrolling is stuttery under Unity8 (but only while you're
  touching it)

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