JacyPerformance

There are several ways to increase the performance of the grammar during parsing and generation.

TableOfContents

Quick Check

Key Arguments

You can gain some performance increase by setting the order in which the daughters of rules are checked (Oepen + Carroll 2002: pp 204--206). The order can be specified in the grammar or in the configuation files for the lkb and pet.

* In the grammar

• You can use KEY-ARG and specify it per rule in the grammar.

binary_rule_left_to_right := rule &
  [ ARGS < [ KEY-ARG + ] , [ KEY-ARG bool ] > ].

* In the LKB (lkb/globals.lsp)

(defparameter *rule-keys*
  '((HEAD-ADJUNCT-RULE1 . 1)
    (COMPOUNDS-RULE . 1)
    (KARA-MADE-RULE . 2) 
    (HEAD_SUBJ_RULE . 2)
    (HEAD-SPECIFIER-RULE . 2)
    (HEAD-COMPLEMENT-RULE . 2) 
    (HEAD-COMPLEMENT2-RULE . 2)
    (HEAD-ADJUNCT-RULE2 . 2)))

* In PET (pet/japanese.set)

;; assoc (rules -> keyarg position) (alternative to KEY-ARG mechanism)
rule-keyargs := 
$HEAD-ADJUNCT-RULE1 1 
$HEAD-ADJUNCT-RULE2 2 
$HEAD-ADJUNCT-RULE3 1 
$RELATIVE-CLAUSE-RULE 1 
$COMPOUNDS-RULE 1 
$SENTENCE-TE-COORDINATION-RULE 1
$CONJ-RULE 1
$KARA-MADE-RULE 2 
$HEAD_SUBJ_RULE 2 
$HEAD-SPECIFIER-RULE 2 
$HEAD-COMPLEMENT-HF-RULE 2 
$HEAD-COMPLEMENT-HI-RULE 1 
$HEAD-COMPLEMENT-AFFIXBIND-RULE 2
$HEAD-COMPLEMENT2-RULE 2 
$HEAD-2OBL-COMPLEMENTS-RULE 2
$VN-LIGHT-RULE 2
$VEND-VEND-RULE 1
$VSTEM-VEND-RULE 2 
$VN-VEND-RULE 2
$PREFIX-ATTACH-RULE 1
$NP-QUEST-FRAG-RULE 2.

Key mode in cheap is set with:

  `-key=n' --- select key mode (0=key-driven, 1=l-r, 2=r-l, 3=head-driven)

default is 0.

You get the data by creating two profiles one with -key=1 and one with key=2, turning on -rulestats. First enable [Process,switches:write rule relation] in itsdb. Use the mode you would normally use (e.g. with packing if you use packing).

Then [Analyze:rule table] for both profiles and you want to check the daughter with the least number of active edges (the passive edges should be the same modulo memory overflow errors).

ToDo

• This would be nice to automate
• It would be nice to share the config between PET and the LKB (or convert)

Spanning Only Rules

Ambiguity Packing

Restrictions on the application of morphological rules

(Depreciated)

Trigger Rules for Generation

Current Issues

• The Idiom optimizations don't seem to be working
• It would be nice to use supertagging