I took a look at the nextflow test (added a 100.times loop around the antlr4 compile to increase the sample size) in jvisualvm. In my sample collection (included below) org.antlr.v4.runtime.atn.ParserATNSimulator.closure(ATNConfig, ATNConfigSet, ATNConfigSet, Set<ATNConfig>, boolean, boolean, PredictionContextCache, int, boolean) used about 1/3rd of the compute time.
I tried making some minor changes to the closure and getEpsilonTarget methods, but wasn't able to achieve more than 2-4% improvement. So, I think performance improvements will need to come from some of the other 10%-ish methods or from changes to the parser grammar that can reduce the number of transitions that need to be explored in the parse graph. [cid:image001.png@01D5D766.3545CAA0] -----Original Message----- From: Daniel.Sun <sun...@apache.org> Sent: Wednesday, January 29, 2020 3:25 PM To: d...@groovy.incubator.apache.org Subject: RE: RE: Groovy 3 very slow stub generation Here is the flame graph for parsing all groovy source files under nextflow module[1] with the distribution built from master. profile.svg <https://urldefense.proofpoint.com/v2/url?u=http-3A__groovy.329449.n5.nabble.com_file_t340716_profile.svg&d=DwICAg&c=4ZIZThykDLcoWk-GVjSLmy8-1Cr1I4FWIvbLFebwKgY&r=tPJuIuL_GkTEazjQW7vvl7mNWVGXn3yJD5LGBHYYHww&m=TYmcOsETGHf1edCwWcLzRlUkEd_PF4RAn4e8iU-wZG0&s=zbVR_UFcVm2aox5USlCnz87SRu-F3QS1uBFuhfcixt8&e= <https://urldefense.proofpoint.com/v2/url?u=http-3A__groovy.329449.n5.nabble.com_file_t340716_profile.svg&d=DwICAg&c=4ZIZThykDLcoWk-GVjSLmy8-1Cr1I4FWIvbLFebwKgY&r=tPJuIuL_GkTEazjQW7vvl7mNWVGXn3yJD5LGBHYYHww&m=TYmcOsETGHf1edCwWcLzRlUkEd_PF4RAn4e8iU-wZG0&s=zbVR_UFcVm2aox5USlCnz87SRu-F3QS1uBFuhfcixt8&e=%20> > Cheers, Daniel.Sun [1] https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_nextflow-2Dio_nextflow_tree_master_modules_nextflow&d=DwICAg&c=4ZIZThykDLcoWk-GVjSLmy8-1Cr1I4FWIvbLFebwKgY&r=tPJuIuL_GkTEazjQW7vvl7mNWVGXn3yJD5LGBHYYHww&m=TYmcOsETGHf1edCwWcLzRlUkEd_PF4RAn4e8iU-wZG0&s=GJ1f550pn5P_L1IMZDISe3B67vkNwRxR6UMN6sK6eUo&e= ----- Apache Groovy committer & PMC member Blog: https://urldefense.proofpoint.com/v2/url?u=http-3A__blog.sunlan.me&d=DwICAg&c=4ZIZThykDLcoWk-GVjSLmy8-1Cr1I4FWIvbLFebwKgY&r=tPJuIuL_GkTEazjQW7vvl7mNWVGXn3yJD5LGBHYYHww&m=TYmcOsETGHf1edCwWcLzRlUkEd_PF4RAn4e8iU-wZG0&s=tOQaYLayumIHoyB0huGHV2uCTgQfH2DpTux-LGJA1Sw&e= Twitter: @daniel_sun -- Sent from: https://urldefense.proofpoint.com/v2/url?u=http-3A__groovy.329449.n5.nabble.com_Groovy-2DDev-2Df372993.html&d=DwICAg&c=4ZIZThykDLcoWk-GVjSLmy8-1Cr1I4FWIvbLFebwKgY&r=tPJuIuL_GkTEazjQW7vvl7mNWVGXn3yJD5LGBHYYHww&m=TYmcOsETGHf1edCwWcLzRlUkEd_PF4RAn4e8iU-wZG0&s=WHRzQw88bMzPD29IhYV5cAXI4ZhmUJH_3s6BQKKdTlY&e=
