|By Joe Winchester||
|March 9, 2005 12:00 AM EST||
Go fast, it runs too slow, you've got to make the number show. Diddle de bop, da la de doop, sitting around and feeling groovy.
Speed Is as Speed Does
Many moons ago I was working on a project that had to be sped up and we had the benefit of a very experienced consultant to help us out. Fresh from his business-class flight and clutching his pay-as-you-go expense account lunch, our management team eagerly led him over to where our assembled developers waited in awe (and with a certain amount of natural coder-sapiens resistance to the hired gun who'd come to town to sheriff us).
Like a surgeon approaching a sick patient we expected a briefcase to be opened revealing dozens of tools for analyzing memory leakage, profiling garbage collection across multiple threads, searching out deadlocks and everything else we assumed was slowing down the program. Instead all he produced was a simple red stopwatch.
All that matters to the user is how long a given scenario takes and whether it's perceived as slow or not. The first thing to do was to identify which tasks were too slow, figure out what response time would be acceptable, and then keep working back against that benchmark.
Apples and Apples
The idea is to focus on real user scenarios and their actual end-to-end response times. Instead of our zippy high-end boxes, dust off older, slower machines and dedicate them to doing the benchmarks. Us spoiled developers often run the latest wizzo kit and don't appreciate the realities of the boxes our code actually runs (or walks on) in the field.
Look Under the Hood
Having identified the slow scenarios, the next step is to identify where the time is going. Probably no single tool can yield all that information, and techniques can vary from simple tracelogs of the current clock time at various stages in the program through to powerful local and total time method breakdowns. Garbage collection, file I/O, page faults, all need to be observed and understood.
Fix What's Broke, Forget What's Not
Looking at the analysis from the running application can yield a bunch of fix candidates. But rather than jumping in and starting to redesign everything, it's good to prove first that there will be a real benefit before doing any work. Like writing a unit test before programming, it may be better to create dummy fixes that simulate the corrected code without being functionally complete. The exercise might involve changing a method to hard coding a result instead of an expensive piece of computation, or putting data in a stale cache and running performance tests to see if the fancy auto-rebuilding dancing cache is really worth doing. Before creating a solution, you have to know there's a real problem as opposed to a perceived one you just feel like polishing. Patch fixes can be created for dummy fixes, applied and run against a full build on the benchmark box to see what affect they have and, by extrapolation, the benefit fully functional fixes will bring to the bottom line.
Optimize Code Paths
Sometimes single method calls result in an explosion of code where a leaf method is being executed thousands of times. With the execution time of the lowest-level method being gauged in fractions of milliseconds, this becomes significant. The solution is to rewrite the code path to avoid such a deluge. The change itself might not be particularly difficult but without a good tool to get the problem on the radar, perhaps as a result of an n squared or even n to the n algorithm, it might never even be considered a possible problem.
One way to produce big performance improvements is to reduce the amount of file reads and writes and socket access. Some data needs to be re-read frequently because it's volatile, but objects such as icons or definition files are good candidates to access once and cache in library registries. Socket I/O is another place to look as well. We found that the problem with one application was in the latency of the conversation, not in the amount of data being sent across the wire. It was overcome by batching data packets together into larger-grained messages.
Cache Model Data
Using a cache to speed something up can be either a silver bullet or fool's gold. The latter is like someone who claims they get great mileage from their car by not driving it. If the program is fast enough to begin with, caches aren't needed, so the first port of call should be to see if there are other unexplored avenues to make things quicker. If a cache is required then it comes with the health warning that you not only have to build it, you need to know when the data you're caching might become stale.
Leave Your Assumptions at the Door
One of the most startling things about tuning a program is that sometimes a lot of fancy code that was initially designed to help performance isn't that useful. Ironically the clever algorithms might actually cause harm. While they may add nothing significant to the bottom line, they can make the code harder to read and understand and affect its maintainability. This is part of the philosophy behind the XP mantra "Make it work, make it right, make it fast." Until you know what's slow, don't try to make it faster.
GENBAND has announced that SageNet is leveraging the Nuvia platform to deliver Unified Communications as a Service (UCaaS) to its large base of retail and enterprise customers. Nuvia’s cloud-based solution provides SageNet’s customers with a full suite of business communications and collaboration tools. Two large national SageNet retail customers have recently signed up to deploy the Nuvia platform and the company will continue to sell the service to new and existing customers. Nuvia’s capabilities include HD voice, video, multimedia messaging, mobility, conferencing, Web collaboration, deskt...
Mar. 30, 2015 01:00 AM EDT Reads: 1,474
SYS-CON Media announced today that @WebRTCSummit Blog, the largest WebRTC resource in the world, has been launched. @WebRTCSummit Blog offers top articles, news stories, and blog posts from the world's well-known experts and guarantees better exposure for its authors than any other publication. @WebRTCSummit Blog can be bookmarked ▸ Here @WebRTCSummit conference site can be bookmarked ▸ Here
Mar. 29, 2015 10:00 PM EDT Reads: 1,814
SYS-CON Events announced today that Cisco, the worldwide leader in IT that transforms how people connect, communicate and collaborate, has been named “Gold Sponsor” of SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. Cisco makes amazing things happen by connecting the unconnected. Cisco has shaped the future of the Internet by becoming the worldwide leader in transforming how people connect, communicate and collaborate. Cisco and our partners are building the platform for the Internet of Everything by connecting the...
Mar. 29, 2015 07:00 PM EDT Reads: 5,236
Temasys has announced senior management additions to its team. Joining are David Holloway as Vice President of Commercial and Nadine Yap as Vice President of Product. Over the past 12 months Temasys has doubled in size as it adds new customers and expands the development of its Skylink platform. Skylink leads the charge to move WebRTC, traditionally seen as a desktop, browser based technology, to become a ubiquitous web communications technology on web and mobile, as well as Internet of Things compatible devices.
Mar. 29, 2015 06:00 PM EDT Reads: 1,856
SYS-CON Events announced today that robomq.io will exhibit at SYS-CON's @ThingsExpo, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. robomq.io is an interoperable and composable platform that connects any device to any application. It helps systems integrators and the solution providers build new and innovative products and service for industries requiring monitoring or intelligence from devices and sensors.
Mar. 29, 2015 06:00 PM EDT Reads: 1,486
The WebRTC Summit 2014 New York, to be held June 9-11, 2015, at the Javits Center in New York, NY, announces that its Call for Papers is open. Topics include all aspects of improving IT delivery by eliminating waste through automated business models leveraging cloud technologies. WebRTC Summit is co-located with 16th International Cloud Expo, @ThingsExpo, Big Data Expo, and DevOps Summit.
Mar. 29, 2015 06:00 PM EDT Reads: 1,605
Docker is an excellent platform for organizations interested in running microservices. It offers portability and consistency between development and production environments, quick provisioning times, and a simple way to isolate services. In his session at DevOps Summit at 16th Cloud Expo, Shannon Williams, co-founder of Rancher Labs, will walk through these and other benefits of using Docker to run microservices, and provide an overview of RancherOS, a minimalist distribution of Linux designed expressly to run Docker. He will also discuss Rancher, an orchestration and service discovery platf...
Mar. 29, 2015 04:15 PM EDT Reads: 2,438
Wearable technology was dominant at this year’s International Consumer Electronics Show (CES) , and MWC was no exception to this trend. New versions of favorites, such as the Samsung Gear (three new products were released: the Gear 2, the Gear 2 Neo and the Gear Fit), shared the limelight with new wearables like Pebble Time Steel (the new premium version of the company’s previously released smartwatch) and the LG Watch Urbane. The most dramatic difference at MWC was an emphasis on presenting wearables as fashion accessories and moving away from the original clunky technology associated with t...
Mar. 29, 2015 04:00 PM EDT Reads: 1,431
SYS-CON Events announced today that Vitria Technology, Inc. will exhibit at SYS-CON’s @ThingsExpo, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. Vitria will showcase the company’s new IoT Analytics Platform through live demonstrations at booth #330. Vitria’s IoT Analytics Platform, fully integrated and powered by an operational intelligence engine, enables customers to rapidly build and operationalize advanced analytics to deliver timely business outcomes for use cases across the industrial, enterprise, and consumer segments.
Mar. 29, 2015 03:30 PM EDT Reads: 2,172
SYS-CON Events announced today that Solgenia will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY, and the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Solgenia is the global market leader in Cloud Collaboration and Cloud Infrastructure software solutions. Designed to “Bridge the Gap” between Personal and Professional Social, Mobile and Cloud user experiences, our solutions help large and medium-sized organizations dr...
Mar. 29, 2015 03:00 PM EDT Reads: 2,858
SYS-CON Events announced today that Liaison Technologies, a leading provider of data management and integration cloud services and solutions, has been named "Silver Sponsor" of SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York, NY. Liaison Technologies is a recognized market leader in providing cloud-enabled data integration and data management solutions to break down complex information barriers, enabling enterprises to make smarter decisions, faster.
Mar. 29, 2015 03:00 PM EDT Reads: 3,470
@ThingsExpo has been named the Top 5 Most Influential M2M Brand by Onalytica in the ‘Machine to Machine: Top 100 Influencers and Brands.' Onalytica analyzed the online debate on M2M by looking at over 85,000 tweets to provide the most influential individuals and brands that drive the discussion. According to Onalytica the "analysis showed a very engaged community with a lot of interactive tweets. The M2M discussion seems to be more fragmented and driven by some of the major brands present in the M2M space. This really allows some room for influential individuals to create more high value inter...
Mar. 29, 2015 01:45 PM EDT Reads: 4,671
After making a doctor’s appointment via your mobile device, you receive a calendar invite. The day of your appointment, you get a reminder with the doctor’s location and contact information. As you enter the doctor’s exam room, the medical team is equipped with the latest tablet containing your medical history – he or she makes real time updates to your medical file. At the end of your visit, you receive an electronic prescription to your preferred pharmacy and can schedule your next appointment.
Mar. 29, 2015 12:00 PM EDT Reads: 808
The world's leading Cloud event, Cloud Expo has launched Microservices Journal on the SYS-CON.com portal, featuring over 19,000 original articles, news stories, features, and blog entries. DevOps Journal is focused on this critical enterprise IT topic in the world of cloud computing. Microservices Journal offers top articles, news stories, and blog posts from the world's well-known experts and guarantees better exposure for its authors than any other publication. Follow new article posts on Twitter at @MicroservicesE
Mar. 29, 2015 12:00 PM EDT Reads: 1,462
The list of ‘new paradigm’ technologies that now surrounds us appears to be at an all time high. From cloud computing and Big Data analytics to Bring Your Own Device (BYOD) and the Internet of Things (IoT), today we have to deal with what the industry likes to call ‘paradigm shifts’ at every level of IT. This is disruption; of course, we understand that – change is almost always disruptive.
Mar. 29, 2015 11:45 AM EDT Reads: 1,128
SYS-CON Events announced today the IoT Bootcamp – Jumpstart Your IoT Strategy, being held June 9–10, 2015, in conjunction with 16th Cloud Expo and Internet of @ThingsExpo at the Javits Center in New York City. This is your chance to jumpstart your IoT strategy. Combined with real-world scenarios and use cases, the IoT Bootcamp is not just based on presentations but includes hands-on demos and walkthroughs. We will introduce you to a variety of Do-It-Yourself IoT platforms including Arduino, Raspberry Pi, BeagleBone, Spark and Intel Edison. You will also get an overview of cloud technologies s...
Mar. 29, 2015 11:00 AM EDT Reads: 2,100
SYS-CON Events announced today that SafeLogic has been named “Bag Sponsor” of SYS-CON's 16th International Cloud Expo® New York, which will take place June 9-11, 2015, at the Javits Center in New York City, NY. SafeLogic provides security products for applications in mobile and server/appliance environments. SafeLogic’s flagship product CryptoComply is a FIPS 140-2 validated cryptographic engine designed to secure data on servers, workstations, appliances, mobile devices, and in the Cloud.
Mar. 29, 2015 11:00 AM EDT Reads: 1,427
SOA Software has changed its name to Akana. With roots in Web Services and SOA Governance, Akana has established itself as a leader in API Management and is expanding into cloud integration as an alternative to the traditional heavyweight enterprise service bus (ESB). The company recently announced that it achieved more than 90% year-over-year growth. As Akana, the company now addresses the evolution and diversification of SOA, unifying security, management, and DevOps across SOA, APIs, microservices, and more.
Mar. 29, 2015 08:30 AM EDT Reads: 2,059
SYS-CON Events announced today that Akana, formerly SOA Software, has been named “Bronze Sponsor” of SYS-CON's 16th International Cloud Expo® New York, which will take place June 9-11, 2015, at the Javits Center in New York City, NY. Akana’s comprehensive suite of API Management, API Security, Integrated SOA Governance, and Cloud Integration solutions helps businesses accelerate digital transformation by securely extending their reach across multiple channels – mobile, cloud and Internet of Things. Akana enables enterprises to share data as APIs, connect and integrate applications, drive part...
Mar. 28, 2015 04:15 PM EDT Reads: 1,553
Cloud is not a commodity. And no matter what you call it, computing doesn’t come out of the sky. It comes from physical hardware inside brick and mortar facilities connected by hundreds of miles of networking cable. And no two clouds are built the same way. SoftLayer gives you the highest performing cloud infrastructure available. One platform that takes data centers around the world that are full of the widest range of cloud computing options, and then integrates and automates everything. Join SoftLayer on June 9 at 16th Cloud Expo to learn about IBM Cloud's SoftLayer platform, explore se...
Mar. 28, 2015 02:00 PM EDT Reads: 1,645