Is backout rate increasing?

David Burns dburns at
Mon Aug 11 12:20:28 UTC 2014

The way that I calculate the backouts, and this might be the 
discrepancy, a push is counted a backout if there is a commit in there 
that has a backout. I don't go and check all the commits, I normally 
jump out of the loop when I find the first one.

Code can be found at


On 11/08/2014 13:10, Rodrigo Rocha Gomes e Souza wrote:
> On Sun, Aug 3, 2014 at 5:42 PM, David Burns <dburns at 
> <mailto:dburns at>> wrote:
>     From my brief analysis of the numbers I have seen higher backout
>     rates than you are reporting but they have been dropping over time.
> Sorry for the delay. Well, there are many ways to filter the data to 
> compute backout rates, so the percentages may be different. I'll send 
> you the details on how I compute statistics.
>     For the last 7 days I have around 8% of pushes have a backout in
>     them on Mozilla Inbound. (26 backouts and 321 pushes you can see
>     the data at )
> That's interesting. Is the source code available?
> []s
> Rodrigo

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