On 4/6/16, 1:21 PM, "Piyush Katariya" <clojure@googlegroups.com on behalf of 
corporate.piy...@gmail.com> wrote:
> Has anybody experienced the performance boost by switching to Clojure version 
> 1.8 (and direct linking) ?

We switched to direct linking in stages. We first moved from 1.7 to 1.8 (which 
brought a direct-linked core). Then we enabled direct-linking for our entire 
code base.

I don’t recall seeing any noticeable improvement with that first stage (it may 
have been a very minor improvement, I no longer recall – we had prerelease 
builds of 1.8 in production for months).

When we enabled direct-linking for our entire code base, we did see a 
performance boost but it was of the order of a few percentage points. Enough to 
warrant keeping it that way (since there’s a tradeoff: you lose the ability to 
easily redefine code via an attached REPL etc).

Initially we used direct-linking on all tiers (dev/ci/qa/prod) but we backed 
off on dev as it was interfering with our REPL-based workflow and it got in the 
way of a few of our tests that mocked functions.

Sean Corfield -- (904) 302-SEAN
An Architect's View -- http://corfield.org/

"If you're not annoying somebody, you're not really alive."
-- Margaret Atwood



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