From 67de8f24b98e1b3ccbb2ff3f1c74e0413ef766c8 Mon Sep 17 00:00:00 2001
From: Tyler Goodlet <jgbt@protonmail.com>
Date: Fri, 28 Jan 2022 08:45:28 -0500
Subject: [PATCH] Init history output with `np.zeros()`

---
 piker/fsp/_engine.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/piker/fsp/_engine.py b/piker/fsp/_engine.py
index 53c872e8..0a318a3e 100644
--- a/piker/fsp/_engine.py
+++ b/piker/fsp/_engine.py
@@ -107,8 +107,8 @@ async def fsp_compute(
     profiler(f'{func_name} generated history')
 
     # build struct array with an 'index' field to push as history
-    history = np.array(
-        np.arange(len(history_output)),
+    history = np.zeros(
+        len(history_output),
         dtype=dst.array.dtype
     )