Synchronicity

Kenneth Fisher discusses synchronous versus asynchronous in programming terms:

Synchronous – Code that runs one one line at a time. Each line of code is completed before the next one starts. If an external call is made then it is completed before the next line of code runs.

Asynchronous – Code that is launched and runs separately from the initial code. If a SQL job is launched from inside a batch of code (using sp_start_job for example) then the job is running in parallel (at the same time as) to the remainder of the batch of code.

Understanding which operations are synchronous versus asynchronous, and which operations are blocking versus non-blocking versus semi-blocking, will do wonders for improving application performance.

Related Posts

Functional Programming And Microservices

Bobby Calderwood might win me over on microservices with talk like this: This view of microservices shares much in common with object-oriented programming: encapsulated data access and mutable state change are both achieved via synchronous calls, the web of such calls among services forming a graph of dependencies. Programmers can and should enjoy a lively […]

Read More

Caching Strategy

Kevin Gessner explains some caching concepts used at Etsy: A major drawback of modulo hashing is that the size of the cache pool needs to be stable over time.  Changing the size of the cache pool will cause most cache keys to hash to a new server.  Even though the values are still in the […]

Read More

Categories

October 2016
MTWTFSS
« Sep Nov »
 12
3456789
10111213141516
17181920212223
24252627282930
31