With Tremulous there was a regression spotted between Mesa 7.4.4 and 7.5.2, which lived on being uncorrected until the Mesa 7.8 series when it was fixed and the performance ended up coming out better than it originally had with Mesa 7.4. Between 7.8.2 and 7.9-devel, it is looking like the performance is at the same level, which still sadly is not playable for an open-source game that is relatively undemanding.
The Urban Terror outcome is the same as World of Padman: there's a major performance regression introduced between Mesa 7.7.3 and 7.8.2 that has yet to be resolved even with Mesa 7.9 code.
Stay tuned for more Mesa 7.9 testing.
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