I believe you should @CompileStatic the code doing t.member = val as well.

On 21 January 2016 at 16:47, Schalk Cronjé <ysb33r@gmail.com> wrote:
No idea if this will improve it, but have you tried the following?

  t.@member = val

On 21/01/2016 15:39, Marshall, Simon wrote:

Hi all, I’d like class field access in specific classes to be without groovy magic, so that it is as fast as possible.  I guess this means disabling runtime metaprogramming for specific classes (or fields).


At first, the http://docs.groovy-lang.org/latest/html/api/groovy/transform/CompileStatic.html annotation looked like it might do the trick, as it mentions class properties being covered.  It certainly works for class methods, but in my testing it didn’t make any difference to class members.  Setting the field “directly” (ie, via t.member below) is still an order of magnitude slower than using its implicit setter directly (ie, t.setMember()).  Similarly for field access vs getter.  That annotation does not seem to cover field access or assignment.


So, is there a way to make field access as quick as using the implicit getter/setter?  Thanks, Simon.


For example, on my 3+GHz Xeon with jdk1.8.0_66/groovy-all-2.4.3, the below code gives me:


t.member = val          34.577

t.setMember(val)        3.529

t.with { member = val } 127.922


package test


import groovy.transform.CompileStatic



class Test {

    String member



String val = 'test'

Test t = new Test()


for (long i = 0; i < 100 * 1000 * 1000; ++i) {




long time = 1000 * 1000 * 1000

long beg = System.currentTimeMillis()

for (long i = 0; i < time; ++i) {

    t.member = val


println('t.member = val\t\t'+(System.currentTimeMillis() - beg) / 1000.0)


beg = System.currentTimeMillis()

for (long i = 0; i < time; ++i) {



println('t.setMember(val)\t'+(System.currentTimeMillis() - beg) / 1000.0)


beg = System.currentTimeMillis()

for (long i = 0; i < time; ++i) {

    t.with { member = val }


println('t.with { member = val }\t'+(System.currentTimeMillis() - beg) / 1000.0)


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Schalk W. Cronjé
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