Merge pull request CesiumGS#1292 from CesiumGS/dont-limit-curl-requests

Remove libCurl limit on maximum HTTP requests

Author: kring

Config/Engine.ini

@@ -5,11 +5,16 @@
 [HTTP.HttpThread]
 RunningThreadedRequestLimit=100
 
-# Network download speed is very sensitive to this value
-# It maps to the sleep time (ms) between every loop of our libcurl processing thread
+# Set HttpThreadActiveFrameTimeInSeconds - Network download speed is very sensitive to this value
+# Maps to the sleep time (ms) between every loop of our libcurl processing thread
 # The value of 0.001 (or 1 ms) has the same performance as 0, yet still reserves some time for idle
+#
+# Set HttpMaxConnectionsPerServer - maps to libcurl's CURLMOPT_MAX_HOST_CONNECTIONS
+# Unreal defaults to 16, but this is lower than a typical value for MaximumSimultaneousTileLoads
+# Use a number just past the highest reasonable value we think a user should ever pick
 [HTTP]
 HttpThreadActiveFrameTimeInSeconds=0.001
+HttpMaxConnectionsPerServer=40
 
 [/Script/Engine.LocalPlayer]
 AspectRatioAxisConstraint=AspectRatio_MaintainXFOV