Loop within loop SAP ABAP Programming langauge

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How to optimize your code performance tips parral cursor methods in a programming language
here a simple way to use


  LOOP AT gt_vbap INTO gs_vbap.
    gs_vbap1-vbeln = gs_vbap-vbeln.
    gs_vbap1-netwr = gs_vbap-netwr.
    COLLECT gs_vbap1 INTO gt_vbap1.
    READ TABLE gt_vbak_new INTO gs_vbak_new WITH  KEY vbeln = gs_vbap-vbeln.
    IF sy-subrc = 0.
      READ TABLE gt_konv INTO gs_konv WITH  KEY knumv = gs_vbak_new-knumv
                                                kposn = gs_vbap-posnr.
      IF sy-subrc = 0.
        LOOP AT gt_konv INTO gs_konv FROM sy-tabix.
          IF  gs_konv-knumv NE gs_vbak_new-knumv AND  gs_konv-knumv NE gs_vbak_new-knumv.
            EXIT.
          ELSE.
            IF gs_konv-kposn EQ gs_vbap-posnr.
              gs_konv1-knumv = gs_konv-knumv.
              gs_konv1-kwert = gs_konv-kwert.
              COLLECT gs_konv1 INTO gt_konv1.
            ENDIF.
            CLEAR gs_konv1.
          ENDIF.            " WHERE kposn  = gs_vbap-vbeln.
        ENDLOOP.
      ENDIF.
    ENDIF.
    CLEAR gs_vbap1.
  ENDLOOP.

*********************************************************************************RICEF
Reports interface Converstion , Enhancements , Forms
Classical Reports ALV Programming, ALE/ IDOC
BDA Programming, Call Transcation , SAP Script, Smartforms, Adove forms,
SAP T-CODE
MM FLOW , SD FLOW , SE11,SE18 ,SE24,SE30, SM12,ST22, SE41, SE51, SE80,SE84
SE90,SE10,SE09,SE03,
Getway T-Code
/IWFND/GW_CLIENT
/IWFND/ERROR_LOG
/IWFND/APPS_LOG
/IWBEP/VIEW_LOG
/IWFND/CACHE_CLEANUP
/IWFND/TRACES

*********************************************************************************

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