Bump Chi to master to fix large memory allocs #170
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Was doing some benchmarking of memory usage running vegeta and saw that memory allocs were pretty insane for
compress/flate.NewWriter(up to 17105 MB) which I tracked down to chi compress middleware. This seems to create a new flate/compressor for each invocation.Updating to master branch of chi seems to fix this by using a sync.Pool of compressors and reduces memory allocs.
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