https://www.synapse.org/#!Synapse:syn10901601 is providing reasonable response today, in marked contrast to yesterday, when navigation and downloads were both consistently impossible. I've been told :} that synapse has "experienced a few hiccups in the last week or two". But all day yesterday (and apparently in the immediately preceeding days, a colleague informs me) even minimal dataset browsing - using a mouse to scroll down a dataset listing page, for example - led to my web browser freezing up. Perhaps more than a hiccup? Having more than a passing acquaintance with web app development, I immediately checked to see that other comparable web sites (github, bioconductor for example), a variety of browsers, and my ISB internet connection allowed for normal navigation and large file download. This was just synapse. Would it be helpful for me to collect specific data if I see this again? If so, please suggest what would be useful. Thanks! Paul

Created by Paul Shannon paul-shannon
Hi all, If anyone else is experiencing an issue like this, please reach out via this thread or at synapseInfo@sagebase.org -- we've followed up and will continue following up with Paul separately on email. Thanks, all! Best, Meredith
Hi Paul, We'll take a look now and see if we can figure out what's going on. I apologize that you've encountered this issue again! :( Stay tuned. Best, Meredith
Everything works well now, thank you! - both website and the R client. Ah, I spoke too soon. Just encountered the website slowdown again, at https://www.synapse.org/#!Synapse:syn10901601 Symptoms: 1) mouse pointer scrolling gets sluggish, then freezes 2) browser posts a "kill this page?" dialog 3) returning to the offending tab (after entering the above message in another tab): page is blank 4) after a few minutes, scrolling returns So much better than yesterday, but still not completely fixed. - Paul
Hi Paul, Thank you so much for reporting your experience and sharing your feedback with us. This was definitely not a hiccup in the Synapse website, it was a performance bug. Your email to synapseInfo@sagebase.org kicked off a series of events. First, we created [a ticket, SWC-3951](https://sagebionetworks.jira.com/browse/SWC-3951) in our issue tracking system, and began to debug the issue. This led to the discovery that each download button contained a significant tree (due to 2 bootstrap modal objects in each download button widget). Dynamically attaching all of these nodes to the DOM led to the poor performance that you experienced. While I was in the area, I was also able to reduce the request count (in half), since we can ask for the restriction information in the entity bundle request. These changes were quickly checked into our staging stack, which was released into production last night (which is why you see the change today). Again, thank you for the report. And please let us know of any other issues that you encounter. Best, Jay Hodgson
Thanks for taking the time to identify this! I did file an issue related to your immediate problem:   https://sagebionetworks.jira.com/browse/SWC-3955   To rule out a browser specific issue with download, you could also attempt the download using one of the other clients - the Python client comes with a command line client as well, so after installing you could try: ```bash synapse get syn10995976 ``` More information on using the clients to download from Synapse can be found here: http://docs.synapse.org/articles/downloading_data.html#downloading-a-file   Since Synapse file storage resides physically on Amazon S3, one other thing you can do is to test your AWS connection using a tool like Cloud Harmony:   http://www.cloudharmony.com/speedtest-downlink-uplink-latency-dns-for-aws:s3-us-east-1-and-aws:s3-us-east-2  

excruciatingly poor performance of synapse web site on 11 dec 2017 page is loading…