From 3a95fbcae9d14bb2b6c938ab74aff461245b6765 Mon Sep 17 00:00:00 2001
From: Christian Schwarz <me@cschwarz.com>
Date: Thu, 31 Aug 2023 07:59:21 +0000
Subject: [PATCH] measured BACKGROUND_RUNTIME performance using `wrk`

Launch wrk from command line 3-4 seconds after the load starts.
=> blocking of executor threads is clearly visible, my branch
  performs _much_ better.

baseline: commit 15b8618d2580aad1b236cc2b4e0779d39d8c9f73 (HEAD -> problame/loadtest-baseline, origin/problame/loadtest-baseline, main)
neon-main (compaction semaphore disabled!)

admin@ip-172-31-13-23:[~/neon]: wrk --latency http://localhost:2342
Running 10s test @ http://localhost:2342
  2 threads and 10 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    71.42ms   15.97ms 125.18ms   70.82%
    Req/Sec    41.44     28.85   101.00     57.35%
  Latency Distribution
     50%   72.53ms
     75%   82.07ms
     90%   91.44ms
     99%  116.56ms
  291 requests in 10.01s, 22.73KB read
  Socket errors: connect 0, read 0, write 0, timeout 10
Requests/sec:     29.07
Transfer/sec:      2.27KB

this branch (comapction semaphore also disabled!):

admin@ip-172-31-13-23:[~/neon]: wrk --latency http://localhost:2342
Running 10s test @ http://localhost:2342
  2 threads and 10 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    45.74ms   64.13ms 293.44ms   83.27%
    Req/Sec   442.81    258.18     1.32k    69.79%
  Latency Distribution
     50%    2.92ms
     75%   75.52ms
     90%  148.03ms
     99%  248.50ms
  8641 requests in 10.01s, 675.08KB read
Requests/sec:    862.81
Transfer/sec:     67.41KB