Add nightly benchmark script.

This commit adds a script for executing a nightly benchmark and posting
the results to Slack.

scripts/bench.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+
+# This script runs benchmarks and posts them to Slack's #nightly channel.
+# The caller of the script should `git pull` on the pilosa repo before executing.
+#
+# Environment variables:
+#   - PILOSA_SRC: Path to pilosa src directory.
+#   - SLACK_OAUTH_TOKEN: Token used to post to Slack.
+
+# Require environment variables.
+: "${PILOSA_SRC:?Must set PILOSA_SRC environment variable}"
+: "${SLACK_OAUTH_TOKEN:?Must set SLACK_OAUTH_TOKEN environment variable}"
+
+# Build pilosa into GOBIN.
+make -C $PILOSA_SRC install
+
+# Retrieve current SHA.
+SHA=$(git -C $PILOSA_SRC rev-parse HEAD)
+
+# Format current date.
+DATE=$(date '+%Y%m%d')
+
+# Execute RBF/Roaring benchmark.
+RBF_PATH=gloat/data/1d/rbf/${DATE}.tar.gz
+TXSRC=rbf gloat run -v -o $RBF_PATH "${BASH_SOURCE%/*}/etc/gloat/gh.1d.yml"
+
+ROARING_PATH=gloat/data/1d/roaring/${DATE}.tar.gz
+TXSRC=roaring gloat run -v -o $ROARING_PATH "${BASH_SOURCE%/*}/etc/gloat/gh.1d.yml"
+
+# Generate graph from results.
+gloat graph -layout 3,2 -size 2048,1024 -name utime,stime,heap_alloc,heap_inuse,heap_objects,num_gc -series rbf,roaring -o /tmp/output.png $RBF_PATH $ROARING_PATH
+
+# Post graph to Slack with SHA.
+curl -F file=@/tmp/output.png -F channels=C01HBFKRLGH -F "initial_comment=RBF vs Roaring, $DATE ($SHA)" -H "Authorization: Bearer $SLACK_OAUTH_TOKEN" https://slack.com/api/files.upload

scripts/etc/gloat/gh.1d.yml

@@ -0,0 +1,7 @@
+name: "GitHub Import Load Testing (1 day)"
+
+main: "pilosa server --data-dir ${TMPDIR} --txsrc ${TXSRC}"
+load: "molecula-consumer-github -i events -d id --record-type event --batch-size=100000 --start-time 2020-01-01T00:00:00Z --end-time 2020-01-01T23:00:00Z --cache-dir .githubarchive" 
+
+health_url: "http://localhost:10101/status"
+debug_url: "http://localhost:10101/debug"