Abstract

StreamCore S.A. commissioned The Tolly Group to evaluate its StreamGroomer Module 200 (M200) Flow Regulator along with its StreamGroomer Manager (SGM), a WAN traffic shaping and optimizing system. 

StreamCore’s StreamGroomer Module 200 and StreamGroomer Manager are positioned as WAN flow-regulation tools designed to improve response times for mission-critical applications when access links are congested. In Tolly’s evaluation, the system was tested across simulated WAN links of 256Kbit/s and 2Mbit/s with both near-site and far-site latency conditions of 10ms and 100ms. The goal was to measure how effectively StreamGroomer could prioritize interactive TCP/IP traffic, regulate bandwidth across both directions of the access link, and stabilize application response time under mixed traffic loads.  

The report shows substantial gains for critical SAP R/3 traffic. On a congested 256Kbit/s link from a simulated near site with 10ms latency, throughput increased from 0.37 to 2.38 transactions per second when StreamGroomer was enabled. On the same link with 100ms latency, throughput improved from 0.32 to 1.3 tps. Across a 2Mbit/s link to the near site, throughput rose from 1.13 to 10.56 tps, while the far-site 100ms case improved from 0.79 to 2.21 tps. These results indicate that the system can preserve interactive performance even when bulk traffic is competing for the same WAN bandwidth.  

Tolly also tested HTTP, FTP, and SMTP traffic under weighted prioritization. When StreamGroomer was configured to give critical HTTP traffic a 4:1 advantage over non-critical traffic, HTTP graphical throughput on a 2Mbit/s link with 10ms latency increased from 108Kbit/s to 140Kbit/s and HTTP text throughput rose from 104Kbit/s to 137Kbit/s, while lower-priority FTP and SMTP flows were reduced accordingly. Similar proportional control was observed at 100ms latency.  

A key technical point is that StreamGroomer creates software tunnels and applies credit-based flow control with weighted fair queuing, allowing bandwidth to be allocated according to administrator-defined relative weights. Tolly also found that the system reduced response-time variability, making file-transfer performance more predictable on saturated WAN links. Overall, the report presents StreamGroomer as a WAN optimization platform that improves application responsiveness, enforces traffic policy precisely, and delivers more stable performance across delayed and fully utilized links.  

After 2001, StreamCore did not disappear immediately: it was re-established in 2004 as Streamcore Systems after the original Streamcore S.A. was terminated in 2003, and it continued selling WAN optimization and QoS products under the Streamcore name.  

In November 2012, Streamcore was acquired by ORSYP, which said the acquisition added WAN traffic and response-time monitoring to its IT operations portfolio.  

In 2026, the Streamcore name still appears online as a networking/software brand focused on QoS, SD-WAN, monitoring, and related services.