github.com/cirocosta/heapvis

heapvis - visualizing heap profile diffs over time

the hypothesis

while being able to visualize a given profile taken at a certain point in time is great, the great insights will come from looking at how that changes over time, as time passes.

heapvis aims at making that simple to do.

for instance, given 18 heap profiles, we can tell how the distribution of inuse_space for certain functions look like:

heapvis generate \
  --profile='*.pprof' \
  --function 'github.com/concourse/concourse/atc.collectPlans' \
  --function='io.copyBuffer' \
  --function='github.com/concourse/concourse/atc/db.(*pipeline).LoadVersionsDB' \
  --function='encoding/json.(*decodeState).literalStore' \
  > ./sample.csv

data <- read.table("./sample.csv", header=TRUE, sep=",")
ggplot(data, aes(x = inuse_space, y = fn)) + 
  geom_density_ridges()