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Overhead in pull-attr-datoms #221

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Overhead in pull-attr-datoms #221

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76 changes: 38 additions & 38 deletions src/datascript/pull_api.cljc
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,7 @@
[transient-coll items]
(reduce conj! transient-coll items))

(def ^:private ^:const +default-limit+ 1000)
;; (defonce ^:private ^:const +default-limit+ 1000)

(defn- initial-frame
[pattern eids multi?]
Expand Down Expand Up @@ -108,45 +108,45 @@

(defn- pull-attr-datoms
[db attr-key attr eid forward? datoms opts [parent & frames]]
(let [limit (get opts :limit +default-limit+)
found (not-empty
(cond->> datoms
limit (into [] (take limit))))]
(if found
(let [ref? (db/ref? db attr)
component? (and ref? (db/component? db attr))
multi? (if forward? (db/multival? db attr) (not component?))
datom-val (if forward? (fn [^Datom d] (.-v d)) (fn [^Datom d] (.-e d)))]
(cond
(contains? opts :subpattern)
(->> (subpattern-frame (:subpattern opts)
(mapv datom-val found)
multi? attr-key)
(conj frames parent))
(if-let [found (not-empty
(if-let [limit (get opts :limit)]
(take limit datoms)
datoms))]
(let [ref? (db/ref? db attr)
component? (and ref? (db/component? db attr))
multi? (if forward? (db/multival? db attr) (not component?))
datom-val (if forward? (fn [^Datom d] (.-v d)) (fn [^Datom d] (.-e d)))]
(cond
(contains? opts :subpattern)
(->> (subpattern-frame (:subpattern opts)
(mapv datom-val found)
multi? attr-key)
(conj frames parent))

(contains? opts :recursion)
(recurse-attr db attr-key multi?
(mapv datom-val found)
eid parent frames)
(contains? opts :recursion)
(recurse-attr db attr-key multi?
(mapv datom-val found)
eid parent frames)

(and component? forward?)
(->> found
(mapv datom-val)
(expand-frame parent eid attr-key multi?)
(conj frames parent))

:else
(let [as-value (cond->> datom-val
ref? (comp #(hash-map :db/id %)))
single? (not multi?)]
(->> (cond-> (into [] (map as-value) found)
single? first)
(update parent :kvps assoc! attr-key)
(conj frames)))))
(->> (cond-> parent
(contains? opts :default)
(update :kvps assoc! attr-key (:default opts)))
(conj frames)))))
(and component? forward?)
(->> found
(mapv datom-val)
(expand-frame parent eid attr-key multi?)
(conj frames parent))
:else
(let [as-value (if ref?
(comp (partial hash-map :db/id) datom-val)
datom-val)]
(->>
(if-not multi?
(as-value (first found))
(map as-value found))
(update parent :kvps assoc! attr-key)
(conj frames)))))
(->> (cond-> parent
(contains? opts :default)
(update :kvps assoc! attr-key (:default opts)))
(conj frames))))

(defn- pull-attr
[db spec eid frames]
Expand Down